正则表达式动态全文本替换

简单来说就是实现全文本替换，符合要求的全部替换

//即将要被替换的字符串
let searchRegExp = new RegExp(item.word,"g"); 

//替换的字符串
let replaceWith = `<span style="color:red;" class='wrong' id='A${item.start}'>${item.word}</span>`

//执行替换
this.content = this.content.replace(searchRegExp, replaceWith)

遍历循环出要替换的字符串，达到全文替换