focus-trap/dist/focus-trap.min.js

Trap focus within a DOM node.

/*!
* focus-trap 6.7.1
* @license MIT, https://github.com/focus-trap/focus-trap/blob/master/LICENSE
*/
"use strict";Object.defineProperty(exports,"__esModule",{value:!0});var e=require("tabbable");function t(e,t){var n=Object.keys(e);if(Object.getOwnPropertySymbols){var a=Object.getOwnPropertySymbols(e);t&&(a=a.filter((function(t){return Object.getOwnPropertyDescriptor(e,t).enumerable}))),n.push.apply(n,a)}return n}function n(e,t,n){return t in e?Object.defineProperty(e,t,{value:n,enumerable:!0,configurable:!0,writable:!0}):e[t]=n,e}var a,r=(a=[],{activateTrap:function(e){if(a.length>0){var t=a[a.length-1];t!==e&&t.pause()}var n=a.indexOf(e);-1===n||a.splice(n,1),a.push(e)},deactivateTrap:function(e){var t=a.indexOf(e);-1!==t&&a.splice(t,1),a.length>0&&a[a.length-1].unpause()}}),o=function(e){return setTimeout(e,0)},i=function(e,t){var n=-1;return e.every((function(e,a){return!t(e)||(n=a,!1)})),n},c=function(e){for(var t=arguments.length,n=new Array(t>1?t-1:0),a=1;a<t;a++)n[a-1]=arguments[a];return"function"==typeof e?e.apply(void 0,n):e},u=function(e){return e.target.shadowRoot&&"function"==typeof e.composedPath?e.composedPath()[0]:e.target};exports.createFocusTrap=function(a,s){var l,f=(null==s?void 0:s.document)||document,b=function(e){for(var a=1;a<arguments.length;a++){var r=null!=arguments[a]?arguments[a]:{};a%2?t(Object(r),!0).forEach((function(t){n(e,t,r[t])})):Object.getOwnPropertyDescriptors?Object.defineProperties(e,Object.getOwnPropertyDescriptors(r)):t(Object(r)).forEach((function(t){Object.defineProperty(e,t,Object.getOwnPropertyDescriptor(r,t))}))}return e}({returnFocusOnDeactivate:!0,escapeDeactivates:!0,delayInitialFocus:!0},s),v={containers:[],tabbableGroups:[],nodeFocusedBeforeActivation:null,mostRecentlyFocusedNode:null,active:!1,paused:!1,delayInitialFocusTimer:void 0},p=function(e,t,n){return e&&void 0!==e[t]?e[t]:b[n||t]},d=function(e){return!(!e||!v.containers.some((function(t){return t.contains(e)})))},h=function(e){var t=b[e];if("function"==typeof t){for(var n=arguments.length,a=new Array(n>1?n-1:0),r=1;r<n;r++)a[r-1]=arguments[r];t=t.apply(void 0,a)}if(!t){if(void 0===t||!1===t)return t;throw new Error("`".concat(e,"` was specified but was not a node, or did not return a node"))}var o=t;if("string"==typeof t&&!(o=f.querySelector(t)))throw new Error("`".concat(e,"` as selector refers to no known node"));return o},y=function(){var e=h("initialFocus");if(!1===e)return!1;if(void 0===e)if(d(f.activeElement))e=f.activeElement;else{var t=v.tabbableGroups[0];e=t&&t.firstTabbableNode||h("fallbackFocus")}if(!e)throw new Error("Your focus-trap needs to have at least one focusable element");return e},m=function(){if(v.tabbableGroups=v.containers.map((function(t){var n=e.tabbable(t);if(n.length>0)return{container:t,firstTabbableNode:n[0],lastTabbableNode:n[n.length-1]}})).filter((function(e){return!!e})),v.tabbableGroups.length<=0&&!h("fallbackFocus"))throw new Error("Your focus-trap must have at least one container with at least one tabbable node in it at all times")},g=function e(t){!1!==t&&t!==f.activeElement&&(t&&t.focus?(t.focus({preventScroll:!!b.preventScroll}),v.mostRecentlyFocusedNode=t,function(e){return e.tagName&&"input"===e.tagName.toLowerCase()&&"function"==typeof e.select}(t)&&t.select()):e(y()))},w=function(e){var t=h("setReturnFocus",e);return t||!1!==t&&e},F=function(t){var n=u(t);d(n)||(c(b.clickOutsideDeactivates,t)?l.deactivate({returnFocus:b.returnFocusOnDeactivate&&!e.isFocusable(n)}):c(b.allowOutsideClick,t)||t.preventDefault())},O=function(e){var t=u(e),n=d(t);n||t instanceof Document?n&&(v.mostRecentlyFocusedNode=t):(e.stopImmediatePropagation(),g(v.mostRecentlyFocusedNode||y()))},E=function(e){if(function(e){return"Escape"===e.key||"Esc"===e.key||27===e.keyCode}(e)&&!1!==c(b.escapeDeactivates,e))return e.preventDefault(),void l.deactivate();(function(e){return"Tab"===e.key||9===e.keyCode})(e)&&function(e){var t=u(e);m();var n=null;if(v.tabbableGroups.length>0){var a=i(v.tabbableGroups,(function(e){return e.container.contains(t)}));if(a<0)n=e.shiftKey?v.tabbableGroups[v.tabbableGroups.length-1].lastTabbableNode:v.tabbableGroups[0].firstTabbableNode;else if(e.shiftKey){var r=i(v.tabbableGroups,(function(e){var n=e.firstTabbableNode;return t===n}));if(r<0&&v.tabbableGroups[a].container===t&&(r=a),r>=0){var o=0===r?v.tabbableGroups.length-1:r-1;n=v.tabbableGroups[o].lastTabbableNode}}else{var c=i(v.tabbableGroups,(function(e){var n=e.lastTabbableNode;return t===n}));if(c<0&&v.tabbableGroups[a].container===t&&(c=a),c>=0){var s=c===v.tabbableGroups.length-1?0:c+1;n=v.tabbableGroups[s].firstTabbableNode}}}else n=h("fallbackFocus");n&&(e.preventDefault(),g(n))}(e)},T=function(e){if(!c(b.clickOutsideDeactivates,e)){var t=u(e);d(t)||c(b.allowOutsideClick,e)||(e.preventDefault(),e.stopImmediatePropagation())}},k=function(){if(v.active)return r.activateTrap(l),v.delayInitialFocusTimer=b.delayInitialFocus?o((function(){g(y())})):g(y()),f.addEventListener("focusin",O,!0),f.addEventListener("mousedown",F,{capture:!0,passive:!1}),f.addEventListener("touchstart",F,{capture:!0,passive:!1}),f.addEventListener("click",T,{capture:!0,passive:!1}),f.addEventListener("keydown",E,{capture:!0,passive:!1}),l},D=function(){if(v.active)return f.removeEventListener("focusin",O,!0),f.removeEventListener("mousedown",F,!0),f.removeEventListener("touchstart",F,!0),f.removeEventListener("click",T,!0),f.removeEventListener("keydown",E,!0),l};return(l={activate:function(e){if(v.active)return this;var t=p(e,"onActivate"),n=p(e,"onPostActivate"),a=p(e,"checkCanFocusTrap");a||m(),v.active=!0,v.paused=!1,v.nodeFocusedBeforeActivation=f.activeElement,t&&t();var r=function(){a&&m(),k(),n&&n()};return a?(a(v.containers.concat()).then(r,r),this):(r(),this)},deactivate:function(e){if(!v.active)return this;clearTimeout(v.delayInitialFocusTimer),v.delayInitialFocusTimer=void 0,D(),v.active=!1,v.paused=!1,r.deactivateTrap(l);var t=p(e,"onDeactivate"),n=p(e,"onPostDeactivate"),a=p(e,"checkCanReturnFocus");t&&t();var i=p(e,"returnFocus","returnFocusOnDeactivate"),c=function(){o((function(){i&&g(w(v.nodeFocusedBeforeActivation)),n&&n()}))};return i&&a?(a(w(v.nodeFocusedBeforeActivation)).then(c,c),this):(c(),this)},pause:function(){return v.paused||!v.active||(v.paused=!0,D()),this},unpause:function(){return v.paused&&v.active?(v.paused=!1,m(),k(),this):this},updateContainerElements:function(e){var t=[].concat(e).filter(Boolean);return v.containers=t.map((function(e){return"string"==typeof e?f.querySelector(e):e})),v.active&&m(),this}}).updateContainerElements(a),l};
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