email-comb/dist/email-comb.esm.js

Remove unused CSS from email templates

/**
 * @name email-comb
 * @fileoverview Remove unused CSS from email templates
 * @version 7.1.0
 * @author Roy Revelt
 * @license MIT
 * {@link https://codsen.com/os/email-comb/}
 */

import{matchRightIncl as w,matchRight as U,matchLeft as Z}from"string-match-left-right";import{emptyCondCommentRegex as sl}from"regex-empty-conditional-comments";import{extract as ce}from"string-extract-class-names";import{pull as Oe}from"array-pull-all-with-glob";import{left as Ye,right as O}from"string-left-right";import{expander as I}from"string-range-expander";import{uglifyArr as il}from"string-uglify";import{rApply as ul}from"ranges-apply";import{crush as rl}from"html-crush";import{Ranges as Je}from"ranges-push";import{matcher as de,isMatch as al}from"matcher";import{hasOwnProp as xe,compareFn as Ie,isPlainObject as Xe,isLatinLetter as Ne,uniq as G,intersection as Ze,pullAll as ve,detectEol as $l}from"codsen-utils";var qe="7.1.0";var Qe=/[\n]?\s*<style[^>]*>\s*<\/style\s*>/g,Fe=/[\n]?\s*@(media|supports|document)[^{]*{\s*}/g,Be=/@media[^{@}]+{(?=\s*<\/style>)/g;var Nl=qe,ml={whitelist:[],backend:[],uglify:!1,removeHTMLComments:!0,removeCSSComments:!0,doNotRemoveHTMLCommentsWhoseOpeningTagContains:["[if","[endif"],htmlCrushOpts:{removeLineBreaks:!1,removeIndentations:!1,removeHTMLComments:!1,removeCSSComments:!1,lineLengthLimit:500},reportProgressFunc:null,reportProgressFuncFrom:0,reportProgressFuncTo:100};function vl(e,te){let el=Date.now(),a=new Je({limitToBeAddedWhitespace:!0}),ge=new Je,ll=new Je;function H(u){return/[-_A-Za-z0-9]/.test(u)}function z(u={}){return{valuesStart:null,valueStart:null,nameStart:null,quoteless:!1,...u}}let C,W,fe,he=[],be=[],Se=[],h,Ee,pe,m,d,ye={},E=0,Re,oe,q,Ue=null,se=[],Me=0,_e=0,Te=0,Q,ie,N,F,B=!1,V,Y,ee,P=null,M=!1,J,le=null,v=0,_=0,nl=`.# ~\\!@$%^&*()+=,/';:"?><[]{}|\`	
`,je=["media","supports","document"],He=["font-feature-values","counter-style","namespace","font-face","keyframes","viewport","charset","import","page"],tl=["{","(","<",'"',"'","@",";"];if(typeof e!="string")throw new TypeError(`email-comb: [THROW_ID_01] Input must be string! Currently it's ${typeof e}`);let X=e.length;if(te&&!Xe(te))throw new TypeError(`email-comb: [THROW_ID_02] Options, second input argument, must be a plain object! Currently it's ${typeof te}, equal to: ${JSON.stringify(te,null,4)}`);let o={...ml,...te};if(typeof o.doNotRemoveHTMLCommentsWhoseOpeningTagContains=="string"&&(o.doNotRemoveHTMLCommentsWhoseOpeningTagContains=[o.doNotRemoveHTMLCommentsWhoseOpeningTagContains].filter(u=>u.trim())),typeof o.whitelist=="string")o.whitelist=[o.whitelist];else if(!Array.isArray(o.whitelist))throw new TypeError(`email-comb: [THROW_ID_03] resolvedOpts.whitelist should be an array, but it was customised to a wrong thing, ${JSON.stringify(o.whitelist,null,4)}`);if(o.whitelist.length&&!o.whitelist.every(u=>typeof u=="string"))throw new TypeError(`email-comb: [THROW_ID_04] resolvedOpts.whitelist array should contain only string-type elements. Currently we\ve got:
${JSON.stringify(o.whitelist,null,4)}`);if(!Array.isArray(o.backend))throw new TypeError(`email-comb: [THROW_ID_05] resolvedOpts.backend should be an array, but it was customised to a wrong thing, ${JSON.stringify(o.backend,null,4)}`);if(o.backend.length&&o.backend.some(u=>!Xe(u)))throw new TypeError(`email-comb: [THROW_ID_06] resolvedOpts.backend array should contain only plain objects but it contains something else:
${JSON.stringify(o.backend,null,4)}`);if(o.backend.length&&!o.backend.every(u=>xe(u,"heads")&&xe(u,"tails")))throw new TypeError(`email-comb: [THROW_ID_07] every object within resolvedOpts.backend should contain keys "heads" and "tails" but currently it's not the case. Whole "resolvedOpts.backend" value array is currently equal to:
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0}}o.removeHTMLComments&&h===null&&e[l]==="<"&&e[l+1]==="!"&&((!b||Array.isArray(b)&&b.length&&!b.includes("<!"))&&(!T||Array.isArray(T)&&T.length&&!T.includes("<!"))&&(!U(e,l+1,"doctype",{i:!0,trimBeforeMatching:!0})&&!(e[l+2]==="-"&&e[l+3]==="-"&&Array.isArray(o.doNotRemoveHTMLCommentsWhoseOpeningTagContains)&&o.doNotRemoveHTMLCommentsWhoseOpeningTagContains.length&&U(e,l+3,o.doNotRemoveHTMLCommentsWhoseOpeningTagContains,{trimBeforeMatching:!0}))&&(h=l,Le=!1,Ce=!0),ie=!(e[l+2]==="-"&&e[l+3]==="-")),h!==l&&(Ee=l))}if($==="}"&&Te&&(Te-=1),!c&&$==="{"&&oe&&(q?Te+=1:(q=!0,r!==null&&(e.slice(r,l).includes(`
`)||e.slice(r,l).includes("\r"))&&a.push(r,l))),c||(e[l].trim()?r!==null&&(r=null):r===null&&(r=l)),!c&&u===2&&Array.isArray(le)&&le.length&&l===le[0][0]){let n=le.shift();n&&n[1]-1>l&&(l=n[1]-1);continue}if(Ee!==null&&e[l]===">"){Ee=null;let n=0;if(o.removeHTMLComments&&Array.isArray(o.doNotRemoveHTMLCommentsWhoseOpeningTagContains)&&o.doNotRemoveHTMLCommentsWhoseOpeningTagContains.length&&(o.doNotRemoveHTMLCommentsWhoseOpeningTagContains.some(i=>i.includes("if"))||o.doNotRemoveHTMLCommentsWhoseOpeningTagContains.some(i=>i.includes("mso"))||o.doNotRemoveHTMLCommentsWhoseOpeningTagContains.some(i=>i.includes("ie")))&&U(e,l,"<!--",{trimBeforeMatching:!0,cb:(i,t,s)=>(n=s,!0)})){U(e,n-1,"-->",{trimBeforeMatching:!0,cb:(i,t,s)=>(n=s,!0)}),typeof n=="number"&&(l=n-1);continue}}}if(u===1){re=G(be.concat(Se)),he.forEach(t=>{ce(t).res.forEach(s=>{xe(ye,s)?ye[s]+=1:ye[s]=1})}),Pe={...ye},ue=G(he.reduce((t,s)=>t.concat(ce(s).res),[])),_e=ue.length;let l=Array.from(he),$=[];for(let t=0,s=l.length;t<s;t++){E+=1;let D;l[t]!=null&&(D=ce(l[t]).res),D&&!D.every(y=>re.includes(y))&&($.push(...ce(l[t]).res),l.splice(t,1),t-=1,s-=1)}$=G(Oe($,o.whitelist));let n;l?.length?n=l.reduce((t,s)=>t.concat(ce(s).res),[]):n=[],ne=Oe(ve(G(Array.from(ue)),be.concat(Se)),o.whitelist),K=G(Oe(ve(be.concat(Se),n),o.whitelist)),ne=G(ne.concat(Ze($,K))),ae=K.filter(t=>t.startsWith(".")).map(t=>t.slice(1)),ke=K.filter(t=>t.startsWith("#")).map(t=>t.slice(1)),ze=Object.keys(Pe).filter(t=>Pe[t]<1),ae=G(ae.concat(Ze(Oe(re,o.whitelist),ze).filter(t=>t[0]===".").map(t=>t.slice(1))));let i=de(re,o.whitelist);K=G(K.concat(ae.map(t=>`.${t}`),ke.map(t=>`#${t}`))),x=ve(ve(Array.from(ue),K),ne),Array.isArray(i)&&i.length&&i.forEach(t=>{x.includes(t)||x.push(t)}),o.uglify&&(se=il(x)),Me=x.length,Ue=o.uglify?x.map((t,s)=>[t,se[s]]).filter(t=>!o.whitelist.some(s=>al(t[0],s))):null,a.current()?le=Array.from(a.current()||[]):le=null}}if(a.push(ll.current()),e.length&&a.current()){let u=a.current();u=u.map(l=>{let $=Ye(e,l[0]),n=O(e,l[1]-1);return typeof $=="number"&&typeof n=="number"&&!l[2]?.trim()&&e[$]===","&&e[n]==="{"?[$,n,l[2]]:l}),e=ul(e,u),a.wipe()}let L=o.reportProgressFuncTo-(o.reportProgressFuncTo-o.reportProgressFuncFrom)*Ge;for(o.reportProgressFunc&&g>=2e3&&(f=Math.floor(L+(o.reportProgressFuncTo-L)/5),f!==R&&(R=f,o.reportProgressFunc(f)));Fe.test(e)||Be.test(e);)e=e.replace(Fe,""),e=e.replace(Be,""),E+=e.length;o.reportProgressFunc&&g>=2e3&&(f=Math.floor(L+(o.reportProgressFuncTo-L)/5*2),f!==R&&(R=f,o.reportProgressFunc(f))),e=e.replace(Qe,De||`
`),E+=e.length,o.reportProgressFunc&&g>=2e3&&(f=Math.floor(L+(o.reportProgressFuncTo-L)/5*3),f!==R&&(R=f,o.reportProgressFunc(f)));let Ve=e.length;return e=e.replace(sl(),""),E+=e.length,Ve!==e.length&&(_+=e.length-Ve),o.reportProgressFunc&&g>=2e3&&(f=Math.floor(L+(o.reportProgressFuncTo-L)/5*4),f!==R&&(R=f,o.reportProgressFunc(f))),e=rl(e,o.htmlCrushOpts).result,Ve!==e.length&&(v+=e.length-Ve),E+=e.length,o.reportProgressFunc&&g>=2e3&&(f=Math.floor(L+(o.reportProgressFuncTo-L)),f!==R&&(R=f,o.reportProgressFunc(f))),e.length&&((!e[0].trim()||!e[e.length-1].trim())&&e.length!==e.trim().length&&(v+=e.length-e.trim().length),e=e.trimStart()),e=e.replace(/ ((class|id)=["']) /g," $1"),{log:{timeTakenInMilliseconds:Date.now()-el,traversedTotalCharacters:E,traversedTimesInputLength:g?Math.round(E/X*100)/100:0,originalLength:X,cleanedLength:e.length,bytesSaved:Math.max(X-e.length,0),percentageReducedOfOriginal:g?Math.round(Math.max(X-e.length,0)*100/X):0,nonIndentationsWhitespaceLength:Math.max(v-We,0),nonIndentationsTakeUpPercentageOfOriginal:g&&Math.max(v-We,0)?Math.round(Math.max(v,0)*100/X):0,commentsLength:_,commentsTakeUpPercentageOfOriginal:g&&_?Math.round(_*100/X):0,uglified:Ue},result:e,countAfterCleaning:Me,countBeforeCleaning:_e,allInHead:ue.sort(Ie),allInBody:re.sort(Ie),deletedFromHead:ne.sort(Ie),deletedFromBody:K.sort(Ie)}}export{vl as comb,ml as defaults,Nl as version};