Category:HTML5

  • HTML development history

    Time:2019-12-15

    Html is the abbreviation of hypertext markup language. Unlike C or Java programming languages, html is composed of tags. Through the tag, you can insert text, picture, link, audio, video and other elements into the web page to describe the web page. Like windows, with the development of technology, HTML has experienced many version updates. […]

  • An example of indexeddb database in HTML5

    Time:2019-12-15

    Preface In the local storage of HTML5, there is a database called indexeddb. This database is a NoSQL database stored in the local of the client, which can store a lot of data. From the first part: HTML5 Advanced Series: web storage, we know that web storage can easily and flexibly access simple data locally, […]

  • On using iframe’s parent-child page to carry out simple mutual transfer of values

    Time:2019-12-14

    When a page uses iframe as nesting, how do you want to pass the data of the parent page to the child page of iframe? How does the child page get the data of the child page or the data of the child page to the parent page? How does the parent page get the […]

  • HTML5 new label datalist realizes dynamic matching between input box and background database data

    Time:2019-12-14

    Recently, there is a small function involved in the project. When customers select suppliers, it is obviously not practical to directly generate a drop-down box due to the large number of suppliers (about 3000), so they change the solution. They plan to use the new tag datalist of HTML5 to automatically enter the database for […]

  • HTML 5 realizes file asynchronous upload function

    Time:2019-12-13

    1 Introduction It’s never pleasant to develop file upload function, especially asynchronous upload. It’s also very uncomfortable to use iframe and flash upload scheme. This paper briefly introduces how to use HTML5’s formdata to realize the asynchronous upload of files, as well as the upload progress bar and file size verification. The server uses the […]

  • Webgl (three. JS) realizes indoor positioning, building BIM, real-time positioning 3D visualization solution — Lesson 5

    Time:2019-12-13

    (write in front, talk about the Internet of things exhibition) last time Shenzhen Convention and Exhibition Center held the Internet of things exhibition, when I saw the exhibition, more than 80% of the Internet of things applications were RFID, indoor positioning, I once doubted the direction limitations and market orientation of the Internet of things […]

  • 1. Vue introduction

    Time:2019-12-12

    1、VUEbrief introduction       Recently,WebThere are many front-end areasMVVMFramework technology, such asAngularJS、React,VUE.jsWait.       Vue.jsDraw lessons fromAngularJSThe design concept ofReactandAngularJSLesson,VUEDesigned as a lightweightMVVMFramework, clear documents, easy to learn, popular with front-end developers.       VueThrough a simpleAPITo provide reactive data binding and composable and reusable view components,It’s not a big, holistic framework.      VueIt is aMVVMThe implementation of the framework only provides […]

  • Localstorage and sessionstorage usage records (recommended)

    Time:2019-12-12

    By reading the usage analysis of lockstorage and sessionstorage by various gods, I have tried it for myself and left a note here. In a project, if you use storage many times and want to store a lot of data, you need to encapsulate it as a function: (this function is written by an Unknown […]

  • 2. Vue constructor and extension

    Time:2019-12-11

    1、VUEBrief introduction of constructors VUEConstructor is a very important grammar. eachVue.jsApplications are all through constructorsVueCreate a root instance.     New了VueObject, and then called thisvueObject and passed data to the constructor. InstantiationVueYou need to pass in aJSONObject, which can contain data, template, hanging element, method, callback function and other options. All options can beAPIView in […]

  • Indexeddb of HTML5 local storage

    Time:2019-12-11

    Indexeddb is a low-level API for clients to store large amounts of structured data (including files / blobs). The API uses indexes to achieve high-performance search of this data. Recently, there is a business requirement that data can be stored offline, and forms and pictures can be uploaded when there is a network signal. So […]

  • / input box set default prompt text (hidden)

    Time:2019-12-10

      The HTML code is as follows: <tr>       <Td > signature:td>       <td><input type=”text” name=”signal” value=””>td> tr> <tr>     <Td > profile:td>       <td  colspan=”4″><textarea name=”description” cols=”78″ rows=”5″ textarea>td> tr> The code is a simple form style. Now there is no prompt text set as follows:  Insert the placeholder property in the code to […]

  • Common HTML 5 list Tags

    Time:2019-12-10

    I. list label function Function: add list semantics to a pile of data, that is, tell search engines to tell browsers that this pile of data is a whole II. List label classification: 1. Unordered list: add list semantics to a pile of data, and all the data in a pile of data have no […]