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javascript-Data Reference type Object

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Author: User
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1<! DOCTYPE html>234<meta charset= "UTF-8" >5<title></title>67<body>8<script>9     //Pass by value: When you assign a value between two variables, or pass a variable as an argument to a function, you copy only one copy of the value from the original variable to the other.Ten     //value of the original type: Modify the new variable without affecting the original variable One     varA=3; A     varB=a;//a copy your value to a copy to B -a++; -Console.log (b);//3 theConsole.log (a);//4 -     //object of reference type: Modify the object with the original variable, and the new variable is also affected. Because two variables refer to the same object -     vardd=[' package ', ' package ', ' package ', ' package ', ' package ']; -     varxx=DD; +dd.length--; -Console.log (String (xx));//4 +Console.log (String (DD));//4 A</script> at</body> -
javascript-Data Reference type Object

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