> npm -v
6.14.4
> node -v
v12.16.2

> node index.js
JS/test-selection-js/node_modules/@simonwep/selection-js/lib/selection.min.js:2
!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).SelectionArea=e()}(this,(function(){"use strict";const t=(t,e="px")=>"number"==typeof t?t+e:t;function e({style:e},s,i){if("object"==typeof s)for(const[i,o]of Object.entries(s))e[i]=t(o);else void 0!==i&&(e[s]=t(i))}function s(t){return(e,s,i,o={})=>{e instanceof HTMLCollection||e instanceof NodeList?e=Array.from(e):Array.isArray(e)||(e=[e]),Array.isArray(s)||(s=[s]);for(const n of e)for(const e of s)n[t](e,i,{capture:!1,...o});return[e,s,i,o]}}const i=s("addEventListener"),o=s("removeEventListener"),n=t=>{const e=t.touches&&t.touches[0]||t;return{tap:e,x:e.clientX,y:e.clientY,target:e.target}};function h(t){let e=t.path||t.composedPath&&t.composedPath();if(e)return e;let s=t.target.parentElement;for(e=[t.target,s];s=s.parentElement;)e.push(s);return e.push(document,window),e}function r(t,e,s="touch"){switch(s){case"center":{const s=e.left+e.width/2,i=e.top+e.height/2;return s>=t.left&&s<=t.right&&i>=t.top&&i<=t.bottom}case"cover":return e.left>=t.left&&e.top>=t.top&&e.right<=t.right&&e.bottom<=t.bottom;case"touch":return t.right>=e.left&&t.left<=e.right&&t.bottom>=e.top&&t.top<=e.bottom;default:throw new Error(`Unkown intersection mode: ${s}`)}}function c(t,e){const s=t.indexOf(e);~s&&t.splice(s,1)}function l(t,e=document){const s=Array.isArray(t)?t:[t],i=[];for(let t=0,o=s.length;t<o;t++){const o=s[t];"string"==typeof o?i.push(...Array.from(e.querySelectorAll(o))):o instanceof HTMLElement&&i.push(o)}return i}const a=window.matchMedia("(hover: none), (pointer: coarse)").matches;const{abs:d,max:u,min:p,ceil:f}=Math;class SelectionArea extends class{constructor(){this.t=new Map,this.on=this.addEventListener,this.off=this.removeEventListener,this.emit=this.dispatchEvent}addEventListener(t,e){const s=this.t.get(t)||new Set;return this.t.set(t,s),s.add(e),this}removeEventListener(t,e){return this.t.get(t)?.delete(e),this}dispatchEvent(t,...e){let s=!0;for(const i of this.t.get(t)||[])s=!1!==i(...e)&&s;return s}unbindAllListeners(){this.t.clear()}}{constructor(t){super(),this.i={touched:[],stored:[],selected:[],changed:{added:[],removed:[]}},this.o=[],this.h=new DOMRect,this.l={y1:0,x2:0,y2:0,x1:0},this.u=!0,this.p=!0,this.m={x:0,y:0},this.v={x:0,y:0},this.disable=this.g.bind(this,!1),this.enable=this.g,this._=Object.assign({class:"selection-area",document:window.document,intersect:"touch",startThreshold:10,singleClick:!0,allowTouch:!0,overlap:"invert",selectables:[],singleTap:{allow:!0,intersect:"native"},scrolling:{speedDivider:10,manualSpeed:750},startareas:["html"],boundaries:["html"],container:"body"},t);for(const t of Object.getOwnPropertyNames(Object.getPrototypeOf(this)))"function"==typeof this[t]&&(this[t]=this[t].bind(this));const{document:s}=this._;this.S=s.createElement("div"),this.T=s.createElement("div"),this.T.appendChild(this.S),this.S.classList.add(this._.class),e(this.S,{willChange:"top, left, bottom, right, width, height",top:0,left:0,position:"fixed"}),e(this.T,{overflow:"hidden",position:"fixed",transform:"translate3d(0, 0, 0)",pointerEvents:"none",zIndex:"1"}),this.enable()}g(t=!0){const{document:e,allowTouch:s}=this._,n=t?i:o;n(e,"mousedown",this.A),s&&n(e,"touchstart",this.A,{passive:!1})}A(t,e=!1){const{x:s,y:o,target:c}=n(t),{_:a}=this,{document:d}=this._,u=c.getBoundingClientRect(),p=l(a.startareas,a.document),f=l(a.boundaries,a.document);this.L=f.find((t=>r(t.getBoundingClientRect(),u)));const m=h(t);if(!this.L||!p.find((t=>m.includes(t)))||!f.find((t=>m.includes(t))))return;if(!e&&!1===this.k("beforestart",t))return;this.l={x1:s,y1:o,x2:0,y2:0};const v=d.scrollingElement||d.body;this.v={x:v.scrollLeft,y:v.scrollTop},this.u=!0,this.clearSelection(!1),i(d,["touchmove","mousemove"],this.j,{passive:!1}),i(d,["mouseup","touchcancel","touchend"],this.M),i(d,"scroll",this.O)}R(t){const{intersect:e}=this._.singleTap,s=n(t);let i=null;if("native"===e)i=s.target;else if("touch"===e){this.resolveSelectables();const{x:t,y:e}=s;i=this.o.find((s=>{const{right:i,left:o,top:n,bottom:h}=s.getBoundingClientRect();return t<i&&t>o&&e<h&&e>n}))}if(!i)return;for(this.resolveSelectables();!this.o.includes(i);){if(!i.parentElement)return;i=i.parentElement}const{stored:o}=this.i;if(this.k("start",t),t.shiftKey&&o.length){const t=o[o.length-1],[e,s]=4&t.compareDocumentPosition(i)?[i,t]:[t,i],n=[...this.o.filter((t=>4&t.compareDocumentPosition(e)&&2&t.compareDocumentPosition(s))),i,e,s];this.select(n)}else o.includes(i)&&(1===o.length||t.ctrlKey)?this.deselect(i):this.select(i);this.k("stop",t)}j(t){const{startThreshold:s,container:h,document:r,allowTouch:c}=this._,{x1:u,y1:p}=this.l,{x:f,y:m}=n(t),v=typeof s;("number"===v&&d(f+m-(u+p))>=s||"object"===v&&d(f-u)>=s.x||d(m-p)>=s.y)&&(o(r,["mousemove","touchmove"],this.j,{passive:!1}),i(r,["mousemove","touchmove"],this.$,{passive:!1}),e(this.S,"display","block"),l(h,r)[0].appendChild(this.T),this.resolveSelectables(),this.u=!1,this.C=this.L.getBoundingClientRect(),this.p=this.L.scrollHeight!==this.L.clientHeight||this.L.scrollWidth!==this.L.clientWidth,this.p&&(i(r,"wheel",this.D,{passive:!1}),this.o=this.o.filter((t=>this.L.contains(t)))),this.H(),this.k("start",t),this.$(t)),c&&a&&t.preventDefault()}H(){const{T:t,L:s,S:i}=this,o=this.C=s.getBoundingClientRect();this.p?(e(t,{top:o.top,left:o.left,width:o.width,height:o.height}),e(i,{marginTop:-o.top,marginLeft:-o.left})):(e(t,{top:0,left:0,width:"100%",height:"100%"}),e(i,{marginTop:0,marginLeft:0}))}$(t){const{x:e,y:s}=n(t),{m:i,l:o,_:h}=this,{allowTouch:r}=h,{speedDivider:c}=h.scrolling,l=this.L;if(o.x2=e,o.y2=s,this.p&&(i.y||i.x)){const e=()=>{if(!i.x&&!i.y)return;const{scrollTop:s,scrollLeft:n}=l;i.y&&(l.scrollTop+=f(i.y/c),o.y1-=l.scrollTop-s),i.x&&(l.scrollLeft+=f(i.x/c),o.x1-=l.scrollLeft-n),this.q(),this.F(),this.k("move",t),this.W(),requestAnimationFrame(e)};requestAnimationFrame(e)}else this.q(),this.F(),this.k("move",t),this.W();r&&a&&t.preventDefault()}O(){const{v:t,_:{document:e}}=this,{scrollTop:s,scrollLeft:i}=e.scrollingElement||e.body;this.l.x1+=t.x-i,this.l.y1+=t.y-s,t.x=i,t.y=s,this.H(),this.q(),this.F(),this.k("move",null),this.W()}D(t){const{manualSpeed:e}=this._.scrolling,s=t.deltaY?t.deltaY>0?1:-1:0,i=t.deltaX?t.deltaX>0?1:-1:0;this.m.y+=s*e,this.m.x+=i*e,this.$(t),t.preventDefault()}q(){const{m:t,l:e,h:s,L:i,C:o}=this,{scrollTop:n,scrollHeight:h,clientHeight:r,scrollLeft:c,scrollWidth:l,clientWidth:a}=i,f=o;let{x1:m,y1:v,x2:g,y2:y}=e;g<f.left?(t.x=c?-d(f.left-g):0,g=f.left):g>f.right?(t.x=l-c-a?d(f.left+f.width-g):0,g=f.right):t.x=0,y<f.top?(t.y=n?-d(f.top-y):0,y=f.top):y>f.bottom?(t.y=h-n-r?d(f.top+f.height-y):0,y=f.bottom):t.y=0;const _=p(m,g),w=p(v,y),x=u(m,g),b=u(v,y);s.x=_,s.y=w,s.width=x-_,s.height=b-w}W(){const{x:t,y:e,width:s,height:i}=this.h,{style:o}=this.S;o.left=`${t}px`,o.top=`${e}px`,o.width=`${s}px`,o.height=`${i}px`}M(t,s){const{document:i,singleTap:n}=this._,{u:h}=this;o(i,["mousemove","touchmove"],this.j),o(i,["touchmove","mousemove"],this.$),o(i,["mouseup","touchcancel","touchend"],this.M),o(i,"scroll",this.O),t&&h&&n.allow?this.R(t):h||s||(this.F(),this.k("stop",t)),this.m.x=0,this.m.y=0,this.p&&o(i,"wheel",this.D,{passive:!0}),this.T.remove(),e(this.S,"display","none")}F(){const{o:t,_:e,i:s,h:i}=this,{stored:o,selected:n,touched:h}=s,{intersect:c,overlap:l}=e,a=[],d=[],u=[];for(let e=0;e<t.length;e++){const s=t[e];if(r(i,s.getBoundingClientRect(),c)){if(n.includes(s))o.includes(s)&&!h.includes(s)&&h.push(s);else{if("invert"===l&&o.includes(s)){u.push(s);continue}d.push(s)}a.push(s)}}"invert"===l&&d.push(...o.filter((t=>!n.includes(t))));for(let t=0;t<n.length;t++){const e=n[t];a.includes(e)||"keep"===l&&o.includes(e)||u.push(e)}s.selected=a,s.changed={added:d,removed:u}}k(t,e){return this.emit(t,{event:e,store:this.i})}trigger(t,e=!0){this.A(t,e)}resolveSelectables(){this.o=l(this._.selectables,this._.document)}keepSelection(){const{_:t,i:e}=this,{selected:s,changed:i,touched:o,stored:n}=e,h=s.filter((t=>!n.includes(t)));switch(t.overlap){case"drop":e.stored=h.concat(n.filter((t=>!o.includes(t))));break;case"invert":e.stored=h.concat(n.filter((t=>!i.removed.includes(t))));break;case"keep":e.stored=n.concat(s.filter((t=>!n.includes(t))))}}clearSelection(t=!0){this.i={stored:t?[]:this.i.stored,selected:[],touched:[],changed:{added:[],removed:[]}}}getSelection(){return this.i.stored}getSelectionArea(){return this.S}cancel(t=!1){this.M(null,!t)}destroy(){this.cancel(),this.disable(),this.T.remove(),super.unbindAllListeners()}select(t,e=!1){const{changed:s,selected:i,stored:o}=this.i,n=l(t,this._.document).filter((t=>!i.includes(t)&&!o.includes(t)));return i.push(...n),s.added.push(...n),!e&&this.k("move",null),n}deselect(t,e=!1){const{selected:s,stored:i,changed:o}=this.i;return!(!s.includes(t)&&!i.includes(t))&&(o.removed.push(t),c(i,t),c(s,t),!e&&this.k("move",null),!0)}}return SelectionArea.version="2.1.1",SelectionArea}));
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

SyntaxError: Unexpected token '.'
    at wrapSafe (internal/modules/cjs/loader.js:1070:16)
    at Module._compile (internal/modules/cjs/loader.js:1120:27)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1176:10)
    at Module.load (internal/modules/cjs/loader.js:1000:32)
    at Function.Module._load (internal/modules/cjs/loader.js:899:14)
    at Module.require (internal/modules/cjs/loader.js:1042:19)
    at require (internal/modules/cjs/helpers.js:77:18)
    at Object.<anonymous> (/Users/fkwok/Projects/JS/test-selection-js/index.js:1:20)
    at Module._compile (internal/modules/cjs/loader.js:1156:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1176:10)