console.log(typeof eleInner); string,
console.log(eleInner instanceof String);false<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
HelloWorld
<script type="text/javascript">
var eleP = document.querySelector("p");
var eleInner = eleP.innerHTML;
console.log(typeof eleInner); //string
console.log(eleInner instanceof String); //false
</script>
</body>
</html>eleInner is only a value with String as the data type and does not belong to an instance of the String object.
string is the built-in string type of js; String is a function.
so a value of type string is not an instance of String
this has a Lei Feng relationship with innerHTML.
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