js replace方法 (字典表匹配替换字符)

常规replace使用

const text1 = 'abcdefg'
const text2 = text1.replace('bc','00')
// text2 = 'a00defg'

字典表匹配替换

 const replacements = {
    '&lt;': '<',
    '&gt;': '>',
    '&ge;': '≥',
    '&le;': '≤',
    '&ne;': '≠'
 }
 const text = '25&lt;78  (27+9)&ge;36'
 const text2 = text.replace(/&(.+?);/g, function($0) { return replacements[$0] })
 // text2 = '25<78  (27+9)≥36'

去除a标签

const text = '1.<a class=\"keyword\" href=\"【考点提示】\" style=\"pointer-events: none;text-decoration:none;color:#505F65\">【考点提示】</a>内容xxxx'
// 保留标签里面的内容
const text2 = text.replace(/<a[^>]*>|<\/a>/g, '')
// text2 = '1.【考点提示】内容xxxx'

// 不保留标签内容
const text3 = text.replace(/<a[^>]*>(.+?)<\/a>/g, '')
// text3 ='1.内容xxxx'