html-ellipsis/out/lib/tags.js

truncates a html string without messing up the tags

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.extractTag = extractTag;
exports.isEndTag = isEndTag;
exports.extractTagName = extractTagName;
exports.isVoidTag = isVoidTag;
/**  taken from http://webdesign.about.com/od/htmltags/qt/html-void-elements.htm */
const voidTags = ['area', 'base', 'br', 'col', 'command', 'embed', 'hr', 'img', 'input', 'link', 'meta', 'param', 'source', 'wbr'];
/**
 * Extracts <tag id="foo"> from a larger string. Assumes str[startIdx] === '<'
 */
function extractTag(str, startIdx) {
    const endIdx = str.indexOf('>', startIdx);
    return str.slice(startIdx, endIdx + 1);
}
/** Checks that <tag> is an end tag */
function isEndTag(tag) {
    return tag[1] === '/';
}
/** Extracts tag from <tag id="foo"> */
function extractTagName(tag) {
    let tagNameEndIdx = tag.indexOf(' ');
    if (tagNameEndIdx === -1) {
        // check for <br/> style tags
        tagNameEndIdx = tag.indexOf('/');
        if (tagNameEndIdx === -1) {
            tagNameEndIdx = tag.length - 1;
        }
    }
    return tag.slice(1, tagNameEndIdx);
}
/** Checks that tagName is a void tag (it doesn't have an end tag) */
function isVoidTag(tagName) {
    for (let i = voidTags.length - 1; i >= 0; --i) {
        if (tagName === voidTags[i]) {
            return true;
        }
    }
    return false;
}
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