Javascript：文本字符串只包含字母数字，$和_

Question

举一个例子To text string只包含alpha numaric，$和_使用javascript

Answer 1

var regex = / [0-9a-zA-Z $ _] + / ig

有关详细信息，请参阅此处

https://developer.mozilla.org/en-US/docs/JavaScript/Guide/Regular_Expressions