js实现string转换成二进制

var PADDING = ''  var string = 'hello world' var resultArray = [] for (var i = 0; i < string.length; i++) {   var compact = string.charCodeAt(i).toString(2)   var padded  = compact.substring(0, PADDING.length - compact.length) + compact   resultArray.push(padded) } console.log(resultArray.join(' ')) 结果：11101 11101100 11101100 11101111 1010 11101111 1111 11100100