html语法树转html
//html语法树节点类型 const typeMap= { '1':function (node) { if(node.attrs&&node.attrs.length>0){ node.attrs.forEach(function (item) { item.type='attrs' }) } return [ '<', node.tag, node.staticClass?[' class=',node.staticClass]:'', node.attrs&&node.attrs.length>0?[' ',joinSymbol(node.attrs,' ')]:'', '>', node.children, '</', node.tag, '>', ]; }, attrs:function (node) { return [node.name,'=',node.value] }, '3':function (node) { return node.text; }, } //语法树转string function AstChildToString(children) { let str=''; children.forEach(function (node) { str+=AstToHtml(node) }) return str; } //元素之间添加符号 function joinSymbol(oriArr,symbol,pre) { if(oriArr.length===0){return '';} const arr=[]; if(pre){ arr.push(pre) } oriArr.forEach(function (node,i) { arr.push(node); if(i<oriArr.length-1){ arr.push(symbol); } }) if(pre){ arr.push(pre) } return arr; } //语法树转string function AstToHtml(ast){ if(Object.prototype.toString.call(ast)==='[object Array]'){ return AstChildToString(ast); }else if(Object.prototype.toString.call(ast)==='[object String]'){ return ast; }else if(ast===null){ return ''; } let code=typeMap[ast.type](ast); if(Object.prototype.toString.call(code)==='[object Array]'){ const arr=code.map(function(obj){ if(Object.prototype.toString.call(obj)==='[object Object]'){ return AstToHtml(obj); }else if(Object.prototype.toString.call(obj)==='[object Array]'){ return AstToHtml(obj); } return obj; }) return arr.join(''); }else{ return code; } } module.exports=AstToHtml;
test.js
//demo const AstToHtml=require('../AstToHtml'); const getText=require('../utils/getText'); const compiler = require('vue-template-compiler'); async function init() { const html=await getText('./test.html') const htmlAst=compiler.compile(html).ast; // console.log(html) console.log(AstToHtml(htmlAst)) } init()