In addition to canvas, another very important function in HTML5 is client-side local storage web storage. Previously, user names and other information could be stored in user-side cookies. Later, it was discovered that there are the following problems with cookie storage:
Size: The size of Cookies is limited to about 4kb
Bandwidth: Cookies are sent together with the HTTP business, so part of the bandwidth will be wasted
Complexity: Required It is very difficult to operate Cookies correctly
In response to the above problems, HTML5 proposes a method to save data locally: web storage
It has two processing methods:
session storage: Save data in the session object. Session is the time that elapses from when a user opens the website to when he closes the website, that is, the time the user browses the website. The session object can save all data during this period.
Local storage: Save data in the client's hardware (hard drive) even if the user's browser is closed. The next time you open it, the
session storage instance
index.html code
<!DOCTYPE html><html lang="en"><head>
<meta charset="UTF-8">
<title>H5表格提交</title>
<script src="appWeb.js"></script></head><body>
<p id="msg"></p>
<input type="text" id="input">
<input type="button" value="保存数据" onclick="saveStorage('input')">
<input type="button" value="读取数据" onclick="loadStorage('msg')"></body></html>appWeb code
/**
* Created by joy liu on 2015/9/22.
*/function saveStorage(id){ var target = document.getElementById(id); var string = target.value;
sessionStorage.setItem("message",string);
}
function loadStorage(id){ var target = document.getElementById(id); var msg = sessionStorage.getItem("message");
target.innerHTML = msg;
}will also be reloaded! ! ! ! Rendering
Instance of local storage
index code has not changed, js code
/**
* Created by joy liu on 2015/9/22.
*///function saveStorage(id){// var target = document.getElementById(id);// var string = target.value;// sessionStorage.setItem("message",string);//}//function loadStorage(id){// var target = document.getElementById(id);// var msg = sessionStorage.getItem("message");// target.innerHTML = msg;//}function saveStorage(id){ var target = document.getElementById(id); var string = target.value;
localStorage.setItem("message",string);
}
function loadStorage(id){ var target = document.getElementById(id); var msg = localStorage.getItem("message");
target.innerHTML = msg;
}Rendering
In addition to canvas, another very important function in HTML5 is the local storage of web storage on the client. Previously, user names and other information could be stored in cookies on the client side. Later, Cookies were discovered Storage has the following problems:
Size: The size of Cookies is limited to about 4kb
Bandwidth: Cookies are sent together with the Http business, so part of the bandwidth is wasted
Complexity: It is difficult to operate Cookies correctly
In response to the above problems, HTML5 proposes a method of saving data locally: web storage
It has two processing methods:
session storage: Save data in the session object. Session is the time that elapses from when a user opens the website to when he closes the website, that is, the time the user browses the website. The session object can save all data during this period.
Local storage: Save data in the client's hardware (hard drive) even if the user's browser is closed. The next time you open it, the
session storage instance
index.html code
<!DOCTYPE html><html lang="en"><head>
<meta charset="UTF-8">
<title>H5表格提交</title>
<script src="appWeb.js"></script></head><body>
<p id="msg"></p>
<input type="text" id="input">
<input type="button" value="保存数据" onclick="saveStorage('input')">
<input type="button" value="读取数据" onclick="loadStorage('msg')"></body></html>appWeb code
/**
* Created by joy liu on 2015/9/22.
*/function saveStorage(id){ var target = document.getElementById(id); var string = target.value;
sessionStorage.setItem("message",string);
}
function loadStorage(id){ var target = document.getElementById(id); var msg = sessionStorage.getItem("message");
target.innerHTML = msg;
}will also be reloaded! ! ! ! Rendering
Instance of local storage
index code has not changed, js code
/**
* Created by joy liu on 2015/9/22.
*///function saveStorage(id){// var target = document.getElementById(id);// var string = target.value;// sessionStorage.setItem("message",string);//}//function loadStorage(id){// var target = document.getElementById(id);// var msg = sessionStorage.getItem("message");// target.innerHTML = msg;//}function saveStorage(id){ var target = document.getElementById(id); var string = target.value;
localStorage.setItem("message",string);
}
function loadStorage(id){ var target = document.getElementById(id); var msg = localStorage.getItem("message");
target.innerHTML = msg;
}Rendering
The above is the content of the Html5 learning journey - Html5 web Storage overview (16). For more related content, please pay attention to the PHP Chinese website (www.php.cn)!
H5 and HTML5: Commonly Used Terms in Web DevelopmentApr 13, 2025 am 12:01 AMH5 and HTML5 refer to the same thing, namely HTML5. HTML5 is the fifth version of HTML, bringing new features such as semantic tags, multimedia support, canvas and graphics, offline storage and local storage, improving the expressiveness and interactivity of web pages.
What Does H5 Refer To? Exploring the ContextApr 12, 2025 am 12:03 AMH5referstoHTML5,apivotaltechnologyinwebdevelopment.1)HTML5introducesnewelementsandAPIsforrich,dynamicwebapplications.2)Itsupportsmultimediawithoutplugins,enhancinguserexperienceacrossdevices.3)SemanticelementsimprovecontentstructureandSEO.4)H5'srespo
H5: Tools, Frameworks, and Best PracticesApr 11, 2025 am 12:11 AMThe tools and frameworks that need to be mastered in H5 development include Vue.js, React and Webpack. 1.Vue.js is suitable for building user interfaces and supports component development. 2.React optimizes page rendering through virtual DOM, suitable for complex applications. 3.Webpack is used for module packaging and optimize resource loading.
The Legacy of HTML5: Understanding H5 in the PresentApr 10, 2025 am 09:28 AMHTML5hassignificantlytransformedwebdevelopmentbyintroducingsemanticelements,enhancingmultimediasupport,andimprovingperformance.1)ItmadewebsitesmoreaccessibleandSEO-friendlywithsemanticelementslike,,and.2)HTML5introducednativeandtags,eliminatingthenee
H5 Code: Accessibility and Semantic HTMLApr 09, 2025 am 12:05 AMH5 improves web page accessibility and SEO effects through semantic elements and ARIA attributes. 1. Use, etc. to organize the content structure and improve SEO. 2. ARIA attributes such as aria-label enhance accessibility, and assistive technology users can use web pages smoothly.
Is h5 same as HTML5?Apr 08, 2025 am 12:16 AM"h5" and "HTML5" are the same in most cases, but they may have different meanings in certain specific scenarios. 1. "HTML5" is a W3C-defined standard that contains new tags and APIs. 2. "h5" is usually the abbreviation of HTML5, but in mobile development, it may refer to a framework based on HTML5. Understanding these differences helps to use these terms accurately in your project.
What is the function of H5?Apr 07, 2025 am 12:10 AMH5, or HTML5, is the fifth version of HTML. It provides developers with a stronger tool set, making it easier to create complex web applications. The core functions of H5 include: 1) elements that allow drawing graphics and animations on web pages; 2) semantic tags such as, etc. to make the web page structure clear and conducive to SEO optimization; 3) new APIs such as GeolocationAPI support location-based services; 4) Cross-browser compatibility needs to be ensured through compatibility testing and Polyfill library.
How to do h5 linkApr 06, 2025 pm 12:39 PMHow to create an H5 link? Determine the link target: Get the URL of the H5 page or application. Create HTML anchors: Use the <a> tag to create an anchor and specify the link target URL. Set link properties (optional): Set target, title, and onclick properties as needed. Add to webpage: Add HTML anchor code to the webpage where you want the link to appear.
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