vue源碼之駝峯轉連字符

var hyphenateRE = /\B([A-Z])/g;

var hyphenate = function (str) {
         return str.replace(hyphenateRE, '-$1').toLowerCase()
}

console.log(hyphenate("aaaaDssssFcccc"));    //  aaaa-dssss-fcccc

// "-$1"：捕獲到什麼字符$1就引用什麼字符,字符加一個“-”