javascript——JS string to int issue to pay attention to—parseInt

  <script>  
  var   str='1250' ;
alert( Number(str) );  //Get 1250

alert(parseInt(str));  //Get 1250

var str1='00100';

alert( Number(str1) );  //Get 100

alert(parseInt(str1));  //Get 64

 

When the parseInt method starts with a number '00', it will be converted as a binary to decimal method, so it is recommended that the number method is best to convert string to int.