When I was debugging the code, I usually check the execution of the js code by using alert in the code block. Today I also saw a friend using console.log function to print out functions, variables, objects, and the usage of console.log is recorded below. The specific syntax is:
console.log("value:",fn);console.log() can output variables, functions, arrays, objects, etc.
<html> <head> <title>this keyword_function call</title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"></head> <body> <input type="text" id="test1" name="firstname" value="" /> <input type="text" id='lastname' name='lastname' value=''> </body> <script type="text/javascript"> var testobj = { 'id': 1, 'content': 'test', 'firstname': function() { var EleFirst= document.getElementById('test1'); //document.getElementById('firstname').value = "zhang"; //document.getElementById("test1").value = this.content; //document.getElementById("test1").setAttribute("value","zhang"); //this.content = val; EleFirst.setAttribute("value", this.content); console.log("The value of the object is: ",test1); //The value of the object is: <input type="text" id="test1" name="firstname" value="" /> }, 'lastname': function() { document.getElementById('lastname').value = "ying"; } }; console.log(testobj);/** Print object**/ testobj.firstname(); testobj.lastname(); </script> </html>