The learning methods and skills of JS

There are times when you are proficient in a language, but it turns out that you're dealing with other languages all day, and maybe you think it's trivial and won't affect your development, but it's the things that you don't value that will waste you a lot of time, and I always thought I was proficient in JavaScript a few years ago, until now , I grew to think that JavaScript was far more complex and powerful than I had imagined, and I began to adore it,
Take advantage of the holidays and put together the methods and techniques for JavaScript so that everyone who is bothered by JavaScript understands that JavaScript is the way it is. And hope that JavaScript can also become your friend, let you suddenly enlightened, in the project better application ~

Fit to read: Know nothing about JavaScript ~ one step away from mastery
Basics: HTML

That's what JavaScript is about. 1: basic knowledge

1 Creating script blocks < scripts language = "JavaScript" >
JavaScript Code goes here
</script >

2 Hide Script code

1: < SCRIPT language = "JavaScript" >
2: <!--
3:document.write ("Hello");
4://-->
5: </script >

Do not execute related code in browsers that do not support JavaScript

3 Browser does not support the display 1: < noscript >
2:hello to the Non-javascript browser.
3: </noscript >

4 link External script file 1: < script language = "JavaScript" src = "/" Filename.js "" ></script >

5 Note Script 1://This is a comment
2:document.write ("Hello"); This is a comment
3:/*
4:all of this
5:is a Comment
6: */

6 Output to Browser 1:document.write ("< strong > Hello </strong >");

7 define variable 1:var myvariable = "some value";

8 string addition 1:var myString = "String1" + "String2";

9 String Search 1: < script language = "JavaScript" >
2: <!--
3:var myvariable = "Hello There";
4:var thereplace = Myvariable.search ("there");
5:document.write (Thereplace);
6://-->
7: </script >

10 String Replacement 1:thisvar.replace ("Monday", "Friday");

11 formatted string 1: < SCRIPT language = "JavaScript" >
2: <!--
3:var myvariable = "Hello There";
4:document.write (Myvariable.big () + "< br/>");
5:document.write (Myvariable.blink () + "< br/>");
6:document.write (Myvariable.bold () + "< br/>");
7:document.write (myvariable.fixed () + "< br/>");
8:document.write (Myvariable.fontcolor ("red") + "< br/>");
9:document.write (Myvariable.fontsize ("18pt") + "< br/>");
10:document.write (Myvariable.italics () + "< br/>");
11:document.write (Myvariable.small () + "< br/>");
12:document.write (Myvariable.strike () + "< br/>");
13:document.write (Myvariable.sub () + "< br/>");
14:document.write (Myvariable.sup () + "< br/>");
15:document.write (Myvariable.tolowercase () + "< br/>");
16:document.write (Myvariable.touppercase () + "< br/>");
17:
18:var firststring = "My String";
19:var finalstring = Firststring.bold (). toLowerCase (). FontColor ("Red");