keillion-dynamsoft-javascript-barcode

Version:

Dynamsoft Barcode Reader JS is a recognition SDK which enables you to embed barcode reading functionality in your web, desktop, and mobile applications. With a few lines of JavaScript code, you can develop a robust application to scan a linear barcode, QR

www.dynamsoft.com/barcode-reader/sdk-javascript

dynamsoft/barcode-reader-javascript

691 lines (643 loc) • 130 kB

HTML

<!doctype html> <html> <head> <meta charset='UTF-8'><meta name='viewport' content='width=device-width initial-scale=1'> <link href='https://fonts.loli.net/css?family=Open+Sans:400italic,700italic,700,400&subset=latin,latin-ext' rel='stylesheet' type='text/css' /><style type='text/css'>html {overflow-x: initial !important;}:root { --bg-color:#ffffff; --text-color:#333333; --select-text-bg-color:#B5D6FC; --select-text-font-color:auto; --monospace:"Lucida Console",Consolas,"Courier",monospace; --title-bar-height:20px; } .mac-os-11 { --title-bar-height:28px; } html { font-size: 14px; background-color: var(--bg-color); color: var(--text-color); font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; } body { margin: 0px; padding: 0px; height: auto; inset: 0px; font-size: 1rem; line-height: 1.42857; overflow-x: hidden; background: inherit; tab-size: 4; } iframe { margin: auto; } a.url { word-break: break-all; } a:active, a:hover { outline: 0px; } .in-text-selection, ::selection { text-shadow: none; background: var(--select-text-bg-color); color: var(--select-text-font-color); } #write { margin: 0px auto; height: auto; width: inherit; word-break: normal; overflow-wrap: break-word; position: relative; white-space: normal; overflow-x: visible; padding-top: 36px; } #write.first-line-indent p { text-indent: 2em; } #write.first-line-indent li p, #write.first-line-indent p * { text-indent: 0px; } #write.first-line-indent li { margin-left: 2em; } .for-image #write { padding-left: 8px; padding-right: 8px; } body.typora-export { padding-left: 30px; padding-right: 30px; } .typora-export .footnote-line, .typora-export li, .typora-export p { white-space: pre-wrap; } .typora-export .task-list-item input { pointer-events: none; } @media screen and (max-width: 500px) { body.typora-export { padding-left: 0px; padding-right: 0px; } #write { padding-left: 20px; padding-right: 20px; } } #write li > figure:last-child { margin-bottom: 0.5rem; } #write ol, #write ul { position: relative; } img { max-width: 100%; vertical-align: middle; image-orientation: from-image; } button, input, select, textarea { color: inherit; font: inherit; } input[type="checkbox"], input[type="radio"] { line-height: normal; padding: 0px; } *, ::after, ::before { box-sizing: border-box; } #write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p, #write pre { width: inherit; } #write h1, #write h2, #write h3, #write h4, #write h5, #write h6, #write p { position: relative; } p { line-height: inherit; } h1, h2, h3, h4, h5, h6 { break-after: avoid-page; break-inside: avoid; orphans: 4; } p { orphans: 4; } h1 { font-size: 2rem; } h2 { font-size: 1.8rem; } h3 { font-size: 1.6rem; } h4 { font-size: 1.4rem; } h5 { font-size: 1.2rem; } h6 { font-size: 1rem; } .md-math-block, .md-rawblock, h1, h2, h3, h4, h5, h6, p { margin-top: 1rem; margin-bottom: 1rem; } .hidden { display: none; } .md-blockmeta { color: rgb(204, 204, 204); font-weight: 700; font-style: italic; } a { cursor: pointer; } sup.md-footnote { padding: 2px 4px; background-color: rgba(238, 238, 238, 0.7); color: rgb(85, 85, 85); border-radius: 4px; cursor: pointer; } sup.md-footnote a, sup.md-footnote a:hover { color: inherit; text-transform: inherit; text-decoration: inherit; } #write input[type="checkbox"] { cursor: pointer; width: inherit; height: inherit; } figure { overflow-x: auto; margin: 1.2em 0px; max-width: calc(100% + 16px); padding: 0px; } figure > table { margin: 0px; } thead, tr { break-inside: avoid; break-after: auto; } thead { display: table-header-group; } table { border-collapse: collapse; border-spacing: 0px; width: 100%; overflow: auto; break-inside: auto; text-align: left; } table.md-table td { min-width: 32px; } .CodeMirror-gutters { border-right: 0px; background-color: inherit; } .CodeMirror-linenumber { user-select: none; } .CodeMirror { text-align: left; } .CodeMirror-placeholder { opacity: 0.3; } .CodeMirror pre { padding: 0px 4px; } .CodeMirror-lines { padding: 0px; } div.hr:focus { cursor: none; } #write pre { white-space: pre-wrap; } #write.fences-no-line-wrapping pre { white-space: pre; } #write pre.ty-contain-cm { white-space: normal; } .CodeMirror-gutters { margin-right: 4px; } .md-fences { font-size: 0.9rem; display: block; break-inside: avoid; text-align: left; overflow: visible; white-space: pre; background: inherit; position: relative !important; } .md-fences-adv-panel { width: 100%; margin-top: 10px; text-align: center; padding-top: 0px; padding-bottom: 8px; overflow-x: auto; } #write .md-fences.mock-cm { white-space: pre-wrap; } .md-fences.md-fences-with-lineno { padding-left: 0px; } #write.fences-no-line-wrapping .md-fences.mock-cm { white-space: pre; overflow-x: auto; } .md-fences.mock-cm.md-fences-with-lineno { padding-left: 8px; } .CodeMirror-line, twitterwidget { break-inside: avoid; } svg { break-inside: avoid; } .footnotes { opacity: 0.8; font-size: 0.9rem; margin-top: 1em; margin-bottom: 1em; } .footnotes + .footnotes { margin-top: 0px; } .md-reset { margin: 0px; padding: 0px; border: 0px; outline: 0px; vertical-align: top; background: 0px 0px; text-decoration: none; text-shadow: none; float: none; position: static; width: auto; height: auto; white-space: nowrap; cursor: inherit; -webkit-tap-highlight-color: transparent; line-height: normal; font-weight: 400; text-align: left; box-sizing: content-box; direction: ltr; } li div { padding-top: 0px; } blockquote { margin: 1rem 0px; } li .mathjax-block, li p { margin: 0.5rem 0px; } li blockquote { margin: 1rem 0px; } li { margin: 0px; position: relative; } blockquote > :last-child { margin-bottom: 0px; } blockquote > :first-child, li > :first-child { margin-top: 0px; } .footnotes-area { color: rgb(136, 136, 136); margin-top: 0.714rem; padding-bottom: 0.143rem; white-space: normal; } #write .footnote-line { white-space: pre-wrap; } @media print { body, html { border: 1px solid transparent; height: 99%; break-after: avoid; break-before: avoid; font-variant-ligatures: no-common-ligatures; } #write { margin-top: 0px; padding-top: 0px; border-color: transparent !important; padding-bottom: 0px !important; } .typora-export * { -webkit-print-color-adjust: exact; } .typora-export #write { break-after: avoid; } .typora-export #write::after { height: 0px; } .is-mac table { break-inside: avoid; } .typora-export-show-outline .typora-export-sidebar { display: none; } } .footnote-line { margin-top: 0.714em; font-size: 0.7em; } a img, img a { cursor: pointer; } pre.md-meta-block { font-size: 0.8rem; min-height: 0.8rem; white-space: pre-wrap; background: rgb(204, 204, 204); display: block; overflow-x: hidden; } p > .md-image:only-child:not(.md-img-error) img, p > img:only-child { display: block; margin: auto; } #write.first-line-indent p > .md-image:only-child:not(.md-img-error) img { left: -2em; position: relative; } p > .md-image:only-child { display: inline-block; width: 100%; } #write .MathJax_Display { margin: 0.8em 0px 0px; } .md-math-block { width: 100%; } .md-math-block:not(:empty)::after { display: none; } .MathJax_ref { fill: currentcolor; } [contenteditable="true"]:active, [contenteditable="true"]:focus, [contenteditable="false"]:active, [contenteditable="false"]:focus { outline: 0px; box-shadow: none; } .md-task-list-item { position: relative; list-style-type: none; } .task-list-item.md-task-list-item { padding-left: 0px; } .md-task-list-item > input { position: absolute; top: 0px; left: 0px; margin-left: -1.2em; margin-top: calc(1em - 10px); border: none; } .math { font-size: 1rem; } .md-toc { min-height: 3.58rem; position: relative; font-size: 0.9rem; border-radius: 10px; } .md-toc-content { position: relative; margin-left: 0px; } .md-toc-content::after, .md-toc::after { display: none; } .md-toc-item { display: block; color: rgb(65, 131, 196); } .md-toc-item a { text-decoration: none; } .md-toc-inner:hover { text-decoration: underline; } .md-toc-inner { display: inline-block; cursor: pointer; } .md-toc-h1 .md-toc-inner { margin-left: 0px; font-weight: 700; } .md-toc-h2 .md-toc-inner { margin-left: 2em; } .md-toc-h3 .md-toc-inner { margin-left: 4em; } .md-toc-h4 .md-toc-inner { margin-left: 6em; } .md-toc-h5 .md-toc-inner { margin-left: 8em; } .md-toc-h6 .md-toc-inner { margin-left: 10em; } @media screen and (max-width: 48em) { .md-toc-h3 .md-toc-inner { margin-left: 3.5em; } .md-toc-h4 .md-toc-inner { margin-left: 5em; } .md-toc-h5 .md-toc-inner { margin-left: 6.5em; } .md-toc-h6 .md-toc-inner { margin-left: 8em; } } a.md-toc-inner { font-size: inherit; font-style: inherit; font-weight: inherit; line-height: inherit; } .footnote-line a:not(.reversefootnote) { color: inherit; } .reversefootnote { font-family: ui-monospace, sans-serif; } .md-attr { display: none; } .md-fn-count::after { content: "."; } code, pre, samp, tt { font-family: var(--monospace); } kbd { margin: 0px 0.1em; padding: 0.1em 0.6em; font-size: 0.8em; color: rgb(36, 39, 41); background: rgb(255, 255, 255); border: 1px solid rgb(173, 179, 185); border-radius: 3px; box-shadow: rgba(12, 13, 14, 0.2) 0px 1px 0px, rgb(255, 255, 255) 0px 0px 0px 2px inset; white-space: nowrap; vertical-align: middle; } .md-comment { color: rgb(162, 127, 3); opacity: 0.6; font-family: var(--monospace); } code { text-align: left; vertical-align: initial; } a.md-print-anchor { white-space: pre !important; border-width: initial !important; border-style: none !important; border-color: initial !important; display: inline-block !important; position: absolute !important; width: 1px !important; right: 0px !important; outline: 0px !important; background: 0px 0px !important; text-decoration: initial !important; text-shadow: initial !important; } .os-windows.monocolor-emoji .md-emoji { font-family: "Segoe UI Symbol", sans-serif; } .md-diagram-panel > svg { max-width: 100%; } [lang="flow"] svg, [lang="mermaid"] svg { max-width: 100%; height: auto; } [lang="mermaid"] .node text { font-size: 1rem; } table tr th { border-bottom: 0px; } video { max-width: 100%; display: block; margin: 0px auto; } iframe { max-width: 100%; width: 100%; border: none; } .highlight td, .highlight tr { border: 0px; } mark { background: rgb(255, 255, 0); color: rgb(0, 0, 0); } .md-html-inline .md-plain, .md-html-inline strong, mark .md-inline-math, mark strong { color: inherit; } .md-expand mark .md-meta { opacity: 0.3 !important; } mark .md-meta { color: rgb(0, 0, 0); } @media print { .typora-export h1, .typora-export h2, .typora-export h3, .typora-export h4, .typora-export h5, .typora-export h6 { break-inside: avoid; } } .md-diagram-panel .messageText { stroke: none !important; } .md-diagram-panel .start-state { fill: var(--node-fill); } .md-diagram-panel .edgeLabel rect { opacity: 1 !important; } .md-fences.md-fences-math { font-size: 1em; } .md-fences-advanced:not(.md-focus) { padding: 0px; white-space: nowrap; border: 0px; } .md-fences-advanced:not(.md-focus) { background: inherit; } .typora-export-show-outline .typora-export-content { max-width: 1440px; margin: auto; display: flex; flex-direction: row; } .typora-export-sidebar { width: 300px; font-size: 0.8rem; margin-top: 80px; margin-right: 18px; } .typora-export-show-outline #write { --webkit-flex:2; flex: 2 1 0%; } .typora-export-sidebar .outline-content { position: fixed; top: 0px; max-height: 100%; overflow: hidden auto; padding-bottom: 30px; padding-top: 60px; width: 300px; } @media screen and (max-width: 1024px) { .typora-export-sidebar, .typora-export-sidebar .outline-content { width: 240px; } } @media screen and (max-width: 800px) { .typora-export-sidebar { display: none; } } .outline-content li, .outline-content ul { margin-left: 0px; margin-right: 0px; padding-left: 0px; padding-right: 0px; list-style: none; } .outline-content ul { margin-top: 0px; margin-bottom: 0px; } .outline-content strong { font-weight: 400; } .outline-expander { width: 1rem; height: 1.42857rem; position: relative; display: table-cell; vertical-align: middle; cursor: pointer; padding-left: 4px; } .outline-expander::before { content: ""; position: relative; font-family: Ionicons; display: inline-block; font-size: 8px; vertical-align: middle; } .outline-item { padding-top: 3px; padding-bottom: 3px; cursor: pointer; } .outline-expander:hover::before { content: ""; } .outline-h1 > .outline-item { padding-left: 0px; } .outline-h2 > .outline-item { padding-left: 1em; } .outline-h3 > .outline-item { padding-left: 2em; } .outline-h4 > .outline-item { padding-left: 3em; } .outline-h5 > .outline-item { padding-left: 4em; } .outline-h6 > .outline-item { padding-left: 5em; } .outline-label { cursor: pointer; display: table-cell; vertical-align: middle; text-decoration: none; color: inherit; } .outline-label:hover { text-decoration: underline; } .outline-item:hover { border-color: rgb(245, 245, 245); background-color: var(--item-hover-bg-color); } .outline-item:hover { margin-left: -28px; margin-right: -28px; border-left: 28px solid transparent; border-right: 28px solid transparent; } .outline-item-single .outline-expander::before, .outline-item-single .outline-expander:hover::before { display: none; } .outline-item-open > .outline-item > .outline-expander::before { content: ""; } .outline-children { display: none; } .info-panel-tab-wrapper { display: none; } .outline-item-open > .outline-children { display: block; } .typora-export .outline-item { padding-top: 1px; padding-bottom: 1px; } .typora-export .outline-item:hover { margin-right: -8px; border-right: 8px solid transparent; } .typora-export .outline-expander::before { content: "+"; font-family: inherit; top: -1px; } .typora-export .outline-expander:hover::before, .typora-export .outline-item-open > .outline-item > .outline-expander::before { content: "−"; } .typora-export-collapse-outline .outline-children { display: none; } .typora-export-collapse-outline .outline-item-open > .outline-children, .typora-export-no-collapse-outline .outline-children { display: block; } .typora-export-no-collapse-outline .outline-expander::before { content: "" !important; } .typora-export-show-outline .outline-item-active > .outline-item .outline-label { font-weight: 700; } .md-inline-math-container mjx-container { zoom: 0.95; } .CodeMirror { height: auto; } .CodeMirror.cm-s-inner { background: inherit; } .CodeMirror-scroll { overflow: auto hidden; z-index: 3; } .CodeMirror-gutter-filler, .CodeMirror-scrollbar-filler { background-color: rgb(255, 255, 255); } .CodeMirror-gutters { border-right: 1px solid rgb(221, 221, 221); background: inherit; white-space: nowrap; } .CodeMirror-linenumber { padding: 0px 3px 0px 5px; text-align: right; color: rgb(153, 153, 153); } .cm-s-inner .cm-keyword { color: rgb(119, 0, 136); } .cm-s-inner .cm-atom, .cm-s-inner.cm-atom { color: rgb(34, 17, 153); } .cm-s-inner .cm-number { color: rgb(17, 102, 68); } .cm-s-inner .cm-def { color: rgb(0, 0, 255); } .cm-s-inner .cm-variable { color: rgb(0, 0, 0); } .cm-s-inner .cm-variable-2 { color: rgb(0, 85, 170); } .cm-s-inner .cm-variable-3 { color: rgb(0, 136, 85); } .cm-s-inner .cm-string { color: rgb(170, 17, 17); } .cm-s-inner .cm-property { color: rgb(0, 0, 0); } .cm-s-inner .cm-operator { color: rgb(152, 26, 26); } .cm-s-inner .cm-comment, .cm-s-inner.cm-comment { color: rgb(170, 85, 0); } .cm-s-inner .cm-string-2 { color: rgb(255, 85, 0); } .cm-s-inner .cm-meta { color: rgb(85, 85, 85); } .cm-s-inner .cm-qualifier { color: rgb(85, 85, 85); } .cm-s-inner .cm-builtin { color: rgb(51, 0, 170); } .cm-s-inner .cm-bracket { color: rgb(153, 153, 119); } .cm-s-inner .cm-tag { color: rgb(17, 119, 0); } .cm-s-inner .cm-attribute { color: rgb(0, 0, 204); } .cm-s-inner .cm-header, .cm-s-inner.cm-header { color: rgb(0, 0, 255); } .cm-s-inner .cm-quote, .cm-s-inner.cm-quote { color: rgb(0, 153, 0); } .cm-s-inner .cm-hr, .cm-s-inner.cm-hr { color: rgb(153, 153, 153); } .cm-s-inner .cm-link, .cm-s-inner.cm-link { color: rgb(0, 0, 204); } .cm-negative { color: rgb(221, 68, 68); } .cm-positive { color: rgb(34, 153, 34); } .cm-header, .cm-strong { font-weight: 700; } .cm-del { text-decoration: line-through; } .cm-em { font-style: italic; } .cm-link { text-decoration: underline; } .cm-error { color: red; } .cm-invalidchar { color: red; } .cm-constant { color: rgb(38, 139, 210); } .cm-defined { color: rgb(181, 137, 0); } div.CodeMirror span.CodeMirror-matchingbracket { color: rgb(0, 255, 0); } div.CodeMirror span.CodeMirror-nonmatchingbracket { color: rgb(255, 34, 34); } .cm-s-inner .CodeMirror-activeline-background { background: inherit; } .CodeMirror { position: relative; overflow: hidden; } .CodeMirror-scroll { height: 100%; outline: 0px; position: relative; box-sizing: content-box; background: inherit; } .CodeMirror-sizer { position: relative; } .CodeMirror-gutter-filler, .CodeMirror-hscrollbar, .CodeMirror-scrollbar-filler, .CodeMirror-vscrollbar { position: absolute; z-index: 6; display: none; outline: 0px; } .CodeMirror-vscrollbar { right: 0px; top: 0px; overflow: hidden; } .CodeMirror-hscrollbar { bottom: 0px; left: 0px; overflow: auto hidden; } .CodeMirror-scrollbar-filler { right: 0px; bottom: 0px; } .CodeMirror-gutter-filler { left: 0px; bottom: 0px; } .CodeMirror-gutters { position: absolute; left: 0px; top: 0px; padding-bottom: 10px; z-index: 3; overflow-y: hidden; } .CodeMirror-gutter { white-space: normal; height: 100%; box-sizing: content-box; padding-bottom: 30px; margin-bottom: -32px; display: inline-block; } .CodeMirror-gutter-wrapper { position: absolute; z-index: 4; background: 0px 0px !important; border: none !important; } .CodeMirror-gutter-background { position: absolute; top: 0px; bottom: 0px; z-index: 4; } .CodeMirror-gutter-elt { position: absolute; cursor: default; z-index: 4; } .CodeMirror-lines { cursor: text; } .CodeMirror pre { border-radius: 0px; border-width: 0px; background: 0px 0px; font-family: inherit; font-size: inherit; margin: 0px; white-space: pre; overflow-wrap: normal; color: inherit; z-index: 2; position: relative; overflow: visible; } .CodeMirror-wrap pre { overflow-wrap: break-word; white-space: pre-wrap; word-break: normal; } .CodeMirror-code pre { border-right: 30px solid transparent; width: fit-content; } .CodeMirror-wrap .CodeMirror-code pre { border-right: none; width: auto; } .CodeMirror-linebackground { position: absolute; inset: 0px; z-index: 0; } .CodeMirror-linewidget { position: relative; z-index: 2; overflow: auto; } .CodeMirror-wrap .CodeMirror-scroll { overflow-x: hidden; } .CodeMirror-measure { position: absolute; width: 100%; height: 0px; overflow: hidden; visibility: hidden; } .CodeMirror-measure pre { position: static; } .CodeMirror div.CodeMirror-cursor { position: absolute; visibility: hidden; border-right: none; width: 0px; } .CodeMirror div.CodeMirror-cursor { visibility: hidden; } .CodeMirror-focused div.CodeMirror-cursor { visibility: inherit; } .cm-searching { background: rgba(255, 255, 0, 0.4); } span.cm-underlined { text-decoration: underline; } span.cm-strikethrough { text-decoration: line-through; } .cm-tw-syntaxerror { color: rgb(255, 255, 255); background-color: rgb(153, 0, 0); } .cm-tw-deleted { text-decoration: line-through; } .cm-tw-header5 { font-weight: 700; } .cm-tw-listitem:first-child { padding-left: 10px; } .cm-tw-box { border-style: solid; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-color: inherit; border-top-width: 0px !important; } .cm-tw-underline { text-decoration: underline; } @media print { .CodeMirror div.CodeMirror-cursor { visibility: hidden; } } :root { --side-bar-bg-color: #fafafa; --control-text-color: #777; } @include-when-export url(https://fonts.loli.net/css?family=Open+Sans:400italic,700italic,700,400&subset=latin,latin-ext); /* open-sans-regular - latin-ext_latin */ /* open-sans-italic - latin-ext_latin */ /* open-sans-700 - latin-ext_latin */ /* open-sans-700italic - latin-ext_latin */ html { font-size: 16px; -webkit-font-smoothing: antialiased; } body { font-family: "Open Sans","Clear Sans", "Helvetica Neue", Helvetica, Arial, 'Segoe UI Emoji', sans-serif; color: rgb(51, 51, 51); line-height: 1.6; } #write { max-width: 860px; margin: 0 auto; padding: 30px; padding-bottom: 100px; } @media only screen and (min-width: 1400px) { #write { max-width: 1024px; } } @media only screen and (min-width: 1800px) { #write { max-width: 1200px; } } #write > ul:first-child, #write > ol:first-child{ margin-top: 30px; 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} .md-lang { color: #b4654d; } /*.html-for-mac { --item-hover-bg-color: #E6F0FE; }*/ #md-notification .btn { border: 0; } .dropdown-menu .divider { border-color: #e5e5e5; opacity: 0.4; } .ty-preferences .window-content { background-color: #fafafa; } .ty-preferences .nav-group-item.active { color: white; background: #999; } .menu-item-container a.menu-style-btn { background-color: #f5f8fa; background-image: linear-gradient( 180deg , hsla(0, 0%, 100%, 0.8), hsla(0, 0%, 100%, 0)); } </style><title>README</title> </head> <body class='typora-export os-windows'><div class='typora-export-content'> <div id='write' class=''><h1 id='barcode-reader-for-your-website---user-guide'>Barcode Reader for Your Website - User Guide</h1><a href='https://www.dynamsoft.com/barcode-reader/sdk-javascript/'>Dynamsoft Barcode Reader JavaScript Edition</a> (DBR-JS) is equipped with industry-leading algorithms for exceptional speed, accuracy and read rates in barcode reading. Using its well-designed API, you can turn your web page into a barcode scanner with just a few lines of code.<img src="https://img.shields.io/npm/v/dynamsoft-javascript-barcode.svg" referrerpolicy="no-referrer" alt="version"> <img src="https://img.shields.io/npm/dm/dynamsoft-javascript-barcode.svg" referrerpolicy="no-referrer" alt="downloads"> <img src="https://img.shields.io/jsdelivr/npm/hm/dynamsoft-javascript-barcode.svg" referrerpolicy="no-referrer" alt="jsdelivr"> <img src="https://img.shields.io/snyk/vulnerabilities/npm/dynamsoft-javascript-barcode.svg" referrerpolicy="no-referrer" alt="vulnerabilities">Once the DBR-JS SDK gets integrated into your web page, your users can access a camera via the browser and read barcodes directly from its video input.In this guide, you will learn step by step on how to integrate the DBR-JS SDK into your website.Table of Contents<ul><li><a href='#barcode-reader-for-your-website---user-guide'>Barcode Reader for Your Website - User Guide</a><ul><li><a href='#hello-world---simplest-implementation'>Hello World - Simplest Implementation</a><ul><li><a href='#understand-the-code'>Understand the code</a><ul><li><a href='#about-the-code'>About the code</a></li></ul></li><li><a href='#run-the-example'>Run the example</a></li></ul></li><li><a href='#building-your-own-page'>Building your own page</a><ul><li><a href='#include-the-sdk'>Include the SDK</a><ul><li><a href='#use-a-cdn'>Use a CDN</a></li><li><a href='#host-the-sdk-yourself'>Host the SDK yourself</a></li></ul></li><li><a href='#configure-the-sdk'>Configure the SDK</a><ul><li><a href='#specify-the-license'>Specify the license</a></li><li><a href='#specify-the-location-of-the-engine-files'>Specify the location of the "engine" files</a></li></ul></li><li><a href='#interact-with-the-sdk'>Interact with the SDK</a><ul><li><a href='#create-a-barcodescanner-object'>Create a <code>BarcodeScanner</code> object</a></li><li><a href='#customize-the-barcodescanner-settings-optional'>Customize the <code>BarcodeScanner</code> Settings (optional)</a></li></ul></li><li><a href='#customize-the-ui-optional'>Customize the UI (optional)</a></li></ul></li><li><a href='#api-documentation'>API Documentation</a></li><li><a href='#system-requirements'>System Requirements</a></li><li><a href='#how-to-upgrade'>How to Upgrade</a></li><li><a href='#release-notes'>Release Notes</a></li><li><a href='#next-steps'>Next Steps</a></li></ul></li></ul>Popular Examples<ul><li>Hello World - <a href='#hello-world---simplest-implementation'>Guide</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-samples/blob/v9.3.1/1.hello-world/1.hello-world.html'>Github</a> | <a href='https://demo.dynamsoft.com/Samples/DBR/JS/1.hello-world/1.hello-world.html?ver=9.3.1&utm_source=guide'>Run</a></li><li>Angular App - <a href='https://www.dynamsoft.com/barcode-reader/programming/javascript/samples-demos/helloworld-angular.html?ver=9.3.1&utm_source=guide'>Guide</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-samples/blob/v9.3.1/1.hello-world/3.read-video-angular'>Github</a> | <a href='https://demo.dynamsoft.com/Samples/DBR/JS/1.hello-world/3.read-video-angular/dist/hello-world/?ver=9.3.1&utm_source=guide'>Run</a></li><li>React App - <a href='https://www.dynamsoft.com/barcode-reader/programming/javascript/samples-demos/helloworld-reactjs.html?ver=9.3.1&utm_source=guide'>Guide</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-samples/blob/v9.3.1/1.hello-world/4.read-video-react'>Github</a> | <a href='https://demo.dynamsoft.com/Samples/DBR/JS/1.hello-world/4.read-video-react/build/?ver=9.3.1&utm_source=guide'>Run</a></li><li>Vue App - <a href='https://www.dynamsoft.com/barcode-reader/programming/javascript/samples-demos/helloworld-vuejsv3.html?ver=9.3.1&utm_source=guide'>Guide</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-samples/blob/v9.3.1/1.hello-world/6.read-video-vue3'>Github</a> | <a href='https://demo.dynamsoft.com/Samples/DBR/JS/1.hello-world/6.read-video-vue3/dist/?ver=9.3.1&utm_source=guide'>Run</a></li><li>PWA App - <a href='https://www.dynamsoft.com/barcode-reader/programming/javascript/samples-demos/helloworld-pwa.html?ver=9.3.1&utm_source=guide'>Guide</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-samples/blob/v9.3.1/1.hello-world/10.read-video-pwa'>Github</a> | <a href='https://demo.dynamsoft.com/Samples/DBR/JS/1.hello-world/10.read-video-pwa/helloworld-pwa.html?ver=9.3.1&utm_source=guide'>Run</a></li><li>Read Driver Licenses - <a href='https://www.dynamsoft.com/barcode-reader/docs/core/programming/usecases/scan-and-parse-AAMVA.html?ver=9.3.1&utm_source=guide&&lang=js'>Guide</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-samples/blob/v9.3.1/4.use-case/2.read-a-drivers-license.html'>Github</a> | <a href='https://demo.dynamsoft.com/samples/dbr/js/4.use-case/2.read-a-drivers-license.html?ver=9.3.1&utm_source=guide'>Run</a></li><li>Fill A Form - <a href='https://www.dynamsoft.com/barcode-reader/docs/core/programming/usecases/scan-barcodes-as-input.html?lang=js&&utm_source=guide'>Guide</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-samples/blob/v9.3.1/4.use-case/1.fill-a-form-with-barcode-reading.html'>Github</a> | <a href='https://demo.dynamsoft.com/samples/dbr/js/4.use-case/1.fill-a-form-with-barcode-reading.html?ver=9.3.1&utm_source=guide'>Run</a></li></ul>You can also:<ul><li>Try the Official Demo - <a href='https://demo.dynamsoft.com/barcode-reader-js/?ver=9.3.1&utm_source=guide'>Run</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-demo/'>Github</a></li><li>Try Online Examples - <a href='https://demo.dynamsoft.com/Samples/DBR/JS/index.html?ver=9.3.1&utm_source=guide'>Run</a> | <a href='https://github.com/Dynamsoft/barcode-reader-javascript-samples/tree/v9.3.1/'>Github</a></li></ul><h2 id='hello-world---simplest-implementation'>Hello World - Simplest Implementation</h2>Let's start with the "Hello World" example of the DBR-JS SDK which demonstrates how to use the minimum code to enable a web page to read barcodes from a live video stream. <ul><li>Basic Requirements<ul><li>Internet connection</li><li><a href='#system-requirements'>A supported browser</a></li><li>Camera access</li></ul></li></ul><h3 id='understand-the-code'>Understand the code</h3>The complete code of the "Hello World" example is shown below<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="html" style="break-inside: unset;"><div class="CodeMirror cm-s-inner cm-s-null-scroll CodeMirror-wrap" lang="html"><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 9.51562px; left: 8px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class="CodeMirror-sizer" style="margin-left: 0px; margin-bottom: 0px; border-right-width: 0px; padding-right: 0px; padding-bottom: 0px;"><div style="position: relative; top: 0px;"><div class="CodeMirror-lines" role="presentation"><div role="presentation" style="position: relative; outline: none;"><div class="CodeMirror-measure">x</div><div class="CodeMirror-measure"></div><div style="position: relative; z-index: 1;"></div><div class="CodeMirror-code" role="presentation" style=""><div class="CodeMirror-activeline" style="position: relative;"><div class="CodeMirror-activeline-background CodeMirror-linebackground"></div><div class="CodeMirror-gutter-background CodeMirror-activeline-gutter" style="left: 0px; width: 0px;"></div><pre class=" CodeMirror-line " role="presentation"><!DOCTYPE html></pre></div><pre class=" CodeMirror-line " role="presentation"><html></pre><pre class=" CodeMirror-line " role="presentation"> </pre><pre class=" CodeMirror-line " role="presentation"><body></pre><pre class=" CodeMirror-line " role="presentation">    <script src="https://cdn.jsdelivr.net/npm/dynamsoft-javascript-barcode@9.3.1/dist/dbr.js"></script></pre><pre class=" CodeMirror-line " role="presentation">    <script></pre><pre class=" CodeMirror-line " role="presentation">        // Specifies a license, you can visit https://www.dynamsoft.com/customer/license/trialLicense?ver=9.3.1&utm_source=guide&product=dbr&package=js to get your own trial license good for 30 days. </pre><pre class=" CodeMirror-line " role="presentation">        Dynamsoft.DBR.BarcodeScanner.license = 'DLS2eyJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSJ9';</pre><pre class=" CodeMirror-line " role="presentation">        // Initializes and uses the SDK</pre><pre class=" CodeMirror-line " role="presentation">       (async () => {</pre><pre class=" CodeMirror-line " role="presentation">            let scanner = await Dynamsoft.DBR.BarcodeScanner.createInstance();</pre><pre class=" CodeMirror-line " role="presentation">            scanner.onFrameRead = results => {</pre><pre class=" CodeMirror-line " role="presentation">                if (results.length > 0) console.log(results);</pre><pre class=" CodeMirror-line " role="presentation">           };</pre><pre class=" CodeMirror-line " role="presentation">            scanner.onUniqueRead = (txt, result) => {</pre><pre class=" CodeMirror-line " role="presentation">                alert(txt);</pre><pre class=" CodeMirror-line " role="presentation">           };</pre><pre class=" CodeMirror-line " role="presentation">            await scanner.show();</pre><pre class=" CodeMirror-line " role="presentation">       })();</pre><pre class=" CodeMirror-line " role="presentation">    </script></pre><pre class=" CodeMirror-line " role="presentation"></body></pre><pre class=" CodeMirror-line " role="presentation"> </pre><pre class=" CodeMirror-line " role="presentation"></html></pre></div></div></div></div></div><div style="position: absolute; height: 0px; width: 1px; border-bottom: 0px solid transparent; top: 645px;"></div><div class="CodeMirror-gutters" style="display: none; height: 645px;"></div></div></div></pre> <a target="_blank" href="https://github.com/Dynamsoft/barcode-reader-javascript-samples/blob/v9.3.1/1.hello-world/1.hello-world.html" title="Code in Github" style="text-decoration:none;"> <img src="https://cdn.jsdelivr.net/npm/simple-icons@3.0.1/icons/github.svg" alt="Code in Github" width="20" height="20" style="width:20px;height:20px;"> </a>   <a target="_blank" href="https://jsfiddle.net/DynamsoftTeam/pL4e7yrd/" title="Run via JSFiddle" style="text-decoration:none;"> <img src="https://cdn.jsdelivr.net/npm/simple-icons@3.0.1/icons/jsfiddle.svg" alt="Run via JSFiddle" width="20" height="20" style="width:20px;height:20px;"> </a>   <a target="_blank" href="https://demo.dynamsoft.com/Samples/DBR/JS/1.hello-world/1.hello-world.html?ver=9.3.1&utm_source=guide" title="Run in Dynamsoft" style="text-decoration:none;"> <img src="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6.0.0/svgs/solid/circle-play.svg" alt="Run in Dynamsoft" width="20" height="20" style="width:20px;height:20px;"> </a> <hr /><h4 id='about-the-code'>About the code</h4><ul><li><code>license</code>: This property specifies a license key. Note that the license "DLS2eyJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSJ9" used in this example is an online license and requires network connection to work. Read more on <a href='#specify-the-license'>Specify the license</a>.</li><li><code>createInstance()</code>: This method creates a <code>BarcodeScanner</code> object. This object can read barcodes directly from a video input with the help of its interactive UI (hidden by default) and the <a target="_blank" href="https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices" title="MediaDevices interface">MediaDevices interface</a>.</li><li><code>onFrameRead</code>: This event is triggered every time the SDK finishes scanning a video frame. The <code>results</code> object contains all the barcode results that the SDK have found on this frame. In this example, we print the results to the browser console.</li><li><code>onUniqueRead</code>: This event is triggered when the SDK finds a new barcode, which is not a duplicate among multiple frames. <code>txt</code> holds the barcode text value while <code>result</code> is an object that holds details of the barcode. In this example, an alert will be displayed for this new barcode.</li><li><code>show()</code>: This method brings up the built-in UI of the <code>BarcodeScanner</code> object and starts scanning.</li></ul><h3 id='run-the-example'>Run the example</h3>You can run the example deployed to <a target="_blank" href="https://demo.dynamsoft.com/Samples/DBR/JS/1.hello-world/1.hello-world.html?ver=9.3.1&utm_source=guide" title="Run in Dynamsoft">the Dynamsoft Demo Server</a> or test it with <a target="_blank" href="https://jsfiddle.net/DynamsoftTeam/pL4e7yrd/" title="Run in JSFiddle">JSFiddle code editor</a>. You will be asked to allow access to your camera, after which the video will be displayed on the page. After that, you can point the camera at a barcode to read it.When a barcode is decoded, you will see the result text pop up and the barcode location will be highlighted in the video feed.Alternatively, you can make a local test simply by taking the code in step 1, pasting it in a file with the name "hello-world.html" and open it in a browser.Note:If you open the web page as <code>file:///</code> or <code>http://</code> , the camera may not work correctly because the API <a target="_blank" href="https://developer.mozilla.org/en-US/docs/Web/API/MediaDevices/getUserMedia" title="getUserMedia">getUserMedia</a> usually requires HTTPS to access the camera.To make sure your web application can access the camera, please configure your web server to support HTTPS. The following links may help.<ol start='' ><li>NGINX: <a target="_blank" href="https://nginx.org/en/docs/http/configuring_https_servers.html" title="Configuring HTTPS servers">Configuring HTTPS servers</a></li><li>IIS: <a target="_blank" href="https://aboutssl.org/how-to-create-a-self-signed-certificate-in-iis/" title="Create a Self Signed Certificate in IIS">Create a Self Signed Certificate in IIS</a></li><li>Tomcat: <a target="_blank" href="https://dzone.com/articles/setting-ssl-tomcat-5-minutes" title="Setting Up SSL on Tomcat in 5 minutes">Setting Up SSL on Tomcat in 5 minutes</a></li><li>Node.js: <a target="_blank" href="https://nodejs.org/docs/v0.4.1/api/tls.html" title="npm tls">npm tls</a></li></ol>If the test doesn't go as expected, you can <a href='https://www.dynamsoft.com/company/contact/?ver=9.3.1&utm_source=guide'>contact us</a>.<iframe width="400" height="225" src="https://www.youtube.com/embed/j4gFtCHcCG4" title="How to Use Dynamsoft Barcode Reader JavaScript SDK | Dynamsoft Tutorial" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen=""></iframe><h2 id='building-your-own-page'>Building your own page</h2><h3 id='include-the-sdk'>Include the SDK</h3><h4 id='use-a-cdn'>Use a CDN</h4>The simplest way to include the SDK is to use either the <a href='https://jsdelivr.com/'>jsDelivr</a> or <a href='https://unpkg.com/'>UNPKG</a> CDN. The "hello world" example above uses jsDelivr.<ul><li>jsDelivr<pre class="md-fences md-end-block ty-contain-cm modeLoaded" spellcheck="false" lang="html"><div class="CodeMirror cm-s-inner cm-s-null-scroll CodeMirror-wrap" lang="html"><div style="overflow: hidden; position: relative; width: 3px; height: 0px; top: 9.42444px; left: 8px;"><textarea autocorrect="off" autocapitalize="off" spellcheck="false" tabindex="0" style="position: absolute; bottom: -1em; padding: 0px; width: 1000px; height: 1em; outline: none;"></textarea></div><div class="CodeMirror-scrollbar-filler" cm-not-content="true"></div><div class="CodeMirror-gutter-filler" cm-not-content="true"></div><div class="CodeMirror-scroll" tabindex="-1"><div class