ES6 字符串String 方法 concat()
ES6 字符串String 方法 concat()
var str1 = new String( "This is string one" );
var str2 = new String( "This is string two" );
var str3 = str1.concat( str2 );
console.log("str1 + str2 : "+str3)
var str1 = new String( "This is string one" );
var str2 = new String( "This is string two" );
var str3 = str1.concat( str2 );
console.log("str1 + str2 : "+str3)