JavaScript basic syntax

JS Code Volume World First

Write a lot of items

Mobile Client Android iOS various gadgets

The domain of the Web page does not do the programming language

Java

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As with CSS, the introduction of files cannot be opened by the browser

Alert Bullet Box

The introduction of external JS files can no longer write code

Use JS in HTML to introduce several.

JS either has or wraps.

Consol.log Output Content

Ah, I'm being exported.

Consol.log output to the console

document.write Output to Page

Alert Bullet Box output

var username= ' Lili ';

Be sure to add Var

Document.getelement here doesn't understand

Contents of the Double tag element

Data types and operators for 3java script

# # #3.1 data types

Original type number (numeric) string (String), Boolean, null, undefined (undefined)

The object type Object,arry is similar to the Python list, date, math, error set (ES6) ...

Scientific counting method

2e2=2*102

JavaScript basic syntax