整理js 里面常用正则

1.必须包含大小写数字 8-16位

/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)[a-zA-Z0-9]{8,16}$/

2.数字千分位展示

function numberWithCommas(x) {
  return x.toString().replace(/\B(?=(\d{3})+(?!\d))/g, ",");
}

3.转义需要转义的

function escapeRegexp(queryToEscape) {
  return queryToEscape.replace(/([.?*+^$[\]\\(){}|-])/g, '\\$1')
}

4. 连字符转驼峰 ad-bd-cd to adBdCd

var camelizeRE = /-(\w)/g;
var camelize = function (str) {
  return str.replace(camelizeRE, function (_, c) {
    return c ? c.toUpperCase() : '';
  })
}

5.驼峰转连字符

var hyphenateRE = /\B([A-Z])/g;
var hyphenate = function (str) {
  return str.replace(hyphenateRE, '-$1').toLowerCase()
};

6.转义html

function htmlEscape(text){
  return text.replace(/[<>"&]/g, function(match, pos, originalText){
    console.log(match, pos, originalText)
    switch(match){
      case "<": return "&lt;";
      case ">":return "&gt;";
      case "&":return "&amp;";
      case "\"":return "&quot;";
    }
  });
}

7.判断相对 绝对路径

var absolutePath = /^(?:\/|(?:[A-Za-z]:)?[\\|/])/;
var relativePath = /^\.?\.\//;
function isAbsolute(path$$1) {
  return absolutePath.test(path$$1);
}
function isRelative(path$$1) {
  return relativePath.test(path$$1);
}

8  只输入中文和英文用户名

/^([\u4e00-\u9fa5]|[a-zA-Z])+$/

 9 手机号

/^1[3456789]\d{9}$/