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This time I will bring you a detailed explanation of the Cookie plug-in js-cookie usage case, what are the precautions for the use of Cookie plug-in js-cookie, the following is a practical case, let’s take a look one time.
Cookie is a small text file placed on the client by the website designer. Generally, the backend language is used more often and can realize some personalized needs of the user. The js-cookie plug-in is a JS plug-in that operates cookies. The source file is only 3.34 KB, which is very lightweight. js-cookie also supports npm and Bower installation and management. Let’s take a look at the specific usage of js-cookie.
A simple, lightweight JavaScript API for handling cookies
Works in all browsers
Accepts any character
Heavily tested
No dependency
Unobtrusive JSON support
Supports AMD/CommonJS
RFC 6265 compliant
Useful Wiki
Enable custom encoding/decoding
~900 bytes gzipped!
Quotation method:
1. Introduce js-cookie.js
1. Drink cdn directly:
2. After downloading locally:
3.ModularizationDuring development: import Cookies from 'js-cookie'
2、 Commonly used APIs and methods of js-cookie.js
a. Setting cookies
Cookies.set('name', 'value', { expires: 7, path : '' });//Expired in 7 days
Cookies.set('name', { foo: 'bar' });//Set a json
b. Read cookies
Cookies.get('name');//Get cookies
Cookies.get(); #Read all cookies
c, delete cookies
Cookies.remove('name'); #Must be the same path when deleting cookies.
The following is a foreign introduction
Basic Usage
Create a cookie, valid across the entire site:
Cookies.set('name', 'value');
Create a cookie that expires 7 days from now, valid across the entire site:
Cookies.set ('name', 'value', { expires: 7 });
Create an expiring cookie, valid to the path of the current page:
Cookies. set('name', 'value', { expires: 7, path: '' });
Read cookie:
Cookies.get('name' ); // => 'value'
Cookies.get('nothing'); // => undefined
Read all visible cookies:
Cookies.get(); // => { name: 'value' }
Delete cookie:
Cookies.remove('name');
Delete a cookie valid to the path of the current page:
Cookies.set('name', 'value', { path: '' });
Cookies.remove('name'); // fail!
Cookies.remove('name', { path: '' }); // removed!
IMPORTANT! When deleting a cookie, you must pass the exact same path and domain attributes that were used to set the cookie, unless you're relying on the default attributes.
Note: Removing a nonexistent cookie does not raise any exception nor return any value.
Namespace conflicts
If there is any danger of a conflict with the namespace Cookies, the noConflict method will allow you to define a new namespace and preserve the original one. This is especially useful when running the script on third party sites e.g. as part of a widget or SDK.
// Assign the js-cookie api to a different variable and restore the original "window.Cookies"
var Cookies2 = Cookies.noConflict();
Cookies2.set('name', 'value');
Note: The .noConflict method is not necessary when using AMD or CommonJS, thus it is not exposed in those environments.
JSON
js-cookie provides unobtrusive JSON storage for cookies.
When creating a cookie you can pass an Array or Object Literal instead of a string in the value. If you do so, js-cookie will store the string representation of the object according to JSON.stringify:
Cookies.set('name', { foo: 'bar' });
When reading a cookie with the default Cookies.get api, you receive the string representation stored in the cookie:
Cookies.get('name'); // => '{"foo":"bar"}'
Cookies.get(); // => { name: '{"foo":"bar"}' }
When reading a cookie with the Cookies.getJSON api, you receive the parsed representation of the string stored in the cookie according to JSON.parse:
Cookies.getJSON('name'); // => { foo: 'bar' }
Cookies.getJSON(); // => { name: { foo: 'bar' } }
Note: To support IE6-7 (and IE 8 compatibility mode) you need to include the JSON-js polyfill: https://github.com/douglascrockford/JSON-js
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