Javascript/JQuery 条件替换

Question

我在 javascript 中有一个变量:

var myvar = "0711111111";

我基本上需要做一个条件:

if (myvar's first character = '0') or (myvar's first character = '+') {

then ... replace the first character with 'somethingelse';

}

Answer 1

请尝试这个!

var myvar =     "0711111111" , repWithChar  =   "x";
var firstChar   =   myvar.charAt(0);
if ((firstChar === "0") || (firstChar === "+")) {
  console.log( myvar.replace(myvar.charAt(0), repWithChar) );
}

输出:x711111111