JavaScript Basics Notes

JavaScript1. The relationship between JS and DOM. The browser has the function of rendering html code. The html source code is formed into a DOM object in the memory, which is the document object. There is a JS interpreter/execution/engine inside the browser. For example, chrome uses the v8 engine. ...

只是没有如果 2018-11-19 20:33:14 0  0  1098

javascript object problem

js objects, what knowledge is often used in actual development? Array? time? Regular expression? For example, do you need to use these for slideshows or other special effects?

PHPz 2017-05-18 10:52:15 0  4  578

How to get the first few layers of keys by specifying the key. It is best to use javascript

{ {code...} } The object data structure is similar to this. When I know the file name AttackArrow.json, I want to get the special effect 1/special effect 1_1 through this file name. How to get it is equivalent to clicking on the file AttackArrow.json. I want to know which folder directory it is in

三叔 2017-06-28 09:28:20 0  2  802

javascript - What is the difference between using append() and appendChild in js?

append should be a method in jq. Why can I achieve the same effect as appendChild when I use js without introducing jq? {code...}

phpcn_u1582 2017-05-19 10:16:34 0  4  742

java - Is there any elegant way to handle calls from different sources differently for the same method?

When I was writing a control. There is a class subViewPager that inherits ViewPager. I need to use the getCurrentItem() method of this ViewPager in another place, which means to get a certain coordinate of this control. But because my ViewPager is for special effects, let it...

淡淡烟草味 2017-07-03 11:42:06 0  2  1264

javascript - HTML native js how to control the table to display or hide based on the value of 0, 1

How can I use native js to control whether to hide or display the table on the right when "Spatial Properties" is selected? TKS! Code: Has no effect! ! !

伊谢尔伦 2017-06-28 09:27:40 0  3  930

angular.js - Input binding to ng-model in angularjs is invalid

Input two-way data binding has no effect. After binding ng-model, the monitoring events are not triggered. Masters, please help. Please help. I have also tried the method of creating an object, but it still doesn't work. <div class="form-group"> {code...} js. {code...}

曾经蜡笔没有小新 2017-06-05 11:09:51 0  1  799

javascript - How to use nextElementSibling to find the next node in js

{Code...} 1. Use nextElementSibling to find the next node with the id of dialogArea and modify its value. 2. Only use native js without jquery. 3. The purpose is to use the hidden input as the positioning coordinates to search downwards when the ID and class of the input cannot be obtained under som...

天蓬老师 2017-05-19 10:12:12 0  3  672

javascript - How does webpack remove duplicate css?

{code...} The code after webpack packaging is {code...} The effect I want is {code...} The following is the content of the webpack configuration file: {code...} Is it possible to configure certain configurations? Cover these repeated codes, or you can use *{} *{} to appear only once, and replace the...

给我你的怀抱 2017-06-12 09:31:15 0  1  1241

javascript - A small problem with js magnifying glass.

It seems that the code can be basically understood through the js magnifying glass, but there is a code that I have tested and I know the effect but I don’t know why it is written like this? The picture cannot be uploaded, I don’t know why. Then let’s get into the code. Anyone who makes this functio...

伊谢尔伦 2017-05-19 10:15:24 0  1  651

javascript - Non-sequential execution of JS code statements. Single-step operation is normal, but problems arise directly.

I want to realize that the pop-up box automatically hides after 3 seconds, I set the following code: {code...} There is no problem with single-step debugging, it will be executed sequentially, I mean the break point, the effect is the same as I imagined, but without interruption If you click Run dir...

滿天的星座 2017-06-26 10:50:14 0  4  677

nginx redirects when accessing a specific page

There are multiple domain names on an nginx server. If I want to access one of the specific pages, I rewrite it to google.com and configure it as follows. I find that it does not take effect. I feel that $http_host$request_uri does not match that page. {Code...} Who knows how to write it?

迷茫 2017-05-16 17:10:55 0  1  528

PHP cURL method to get redirect target without following redirect

The curl_getinfo function returns a large amount of metadata about the result of the HTTP request. However, for some reason it doesn't contain the information I currently want, which is the target URL if the request returns an HTTP redirect code. I'm not using CURLOPT_FOLLOWLOCATION because I want t...

P粉575055974 2023-10-25 08:56:01 0  1  813

javascript - Problems with model data binding in vue.js

In the following code, why does the el element in js have to be bound to the id cc of the div to achieve the effect of instant input? On the contrary, if it is directly bound to the id of the input, it cannot be achieved? After all, the message of the model is applied to the input {code...}

大家讲道理 2017-05-19 10:22:05 0  3  579

javascript - What is the effect of deleting page nodes in js? Isn't it the same effect to directly delete the specific code?

Xiaobai asked. Another reason is why in jquery, when append is inserted into a node, you can directly $("div").append("<div>hello</div>"). Why can you omit $("")? It is not necessary to create a new node in jq. ("")?

迷茫 2017-06-26 10:52:18 0  1  733

javascript - js click event, using css3 transition for transition, has no effect. The following code

html {code...} css {code...} js {code...}

学习ing 2017-07-05 10:43:56 0  3  1291

javascript - Question about viewing bound events? I hope seniors can give me advice.

The problem I encountered is that some websites use code written by their own js library or framework instead of jquery. But I would like to know how this effect is achieved. Is there any method? ps: For non-jquery, using the $._data(DOMobject,'events') method in chrome and firefox does not work...

曾经蜡笔没有小新 2017-05-19 10:31:13 0  1  580

javascript - The loading animation effect of the page is not displayed?

1. The project I am working on now is a data table page. Since the background query takes a long time, in order to improve the user experience, a load animation is added. There is no problem with the plug-in for loading animation. However, during the execution of the method, it is found that the ani...

迷茫 2017-05-19 10:18:28 0  4  703

Extract more information from PHP pages using JavaScript

In order to automatically update a certain part of the page without having to constantly reload the page, I have implemented this code on the platform. If you just want to update a piece of data, everything works fine, in fact the php page contains multiple queries to populate different sections. Ho...

P粉445714413 2023-08-13 12:27:33 0  1  586

javascript - How to make the search box of the navigation website automatically obtain the input cursor focus?

For example, after opening this navigation website: https://www.2345.com/, the cursor does not automatically locate the Baidu search box. I tried to get the id and then call the focus function, but it did not work. How to write a piece of js code to achieve this every time I open this website? What ...

PHP中文网 2017-06-12 09:28:26 0  2  818