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1. Convert string type to Json object method  1. Conversion methods supported by Javascript: eval          eval(‘(‘ jsonstr ‘)’); Note: You need to wrap a pair of parentheses around the json character. ie8 (compatibility mode), ie7 and ie6 can also use eval() to convert strings to JSON objects, but these methods are […]

function fun () { let startTime = new Date(‘2015-12-20’); // start time let endTime = new Date(); // end time let usedTime = endTime – startTime; // difference in milliseconds let days = Math.floor (usedTime / (24 * 3600 * 1000)); // Calculate the number of days let leavel … The post JS Computing the

In the process of developing the project, I suddenly encountered an error of 400 Bad Request Request Header Or Cookie Too Large. This is the first time I have such an error, and it feels quite novel. Analyze the reason for the error: Caused by the request header is too large, the request is too

Concave Language™ (concave pronunciation “Wa”) is an experimental programming language designed by Chai Shushan, Ding Ernan and Shi Bin . +—+ +—+ | o | | o | | +—-+ | | | | Wa | | | +————+ Install and test: Install Clang , make sure the local clang command is valid go install

XMLHttpRequest supports both synchronous and asynchronous communications. In general, however, asynchronous requests should be preferred to synchronous requests for performance reasons. Synchronous requests block the execution of code which causes “freezing” on the screen and an unresponsive user experience. Asynchronous … The post how to send Synchronous and asynchronous ajax requests first appeared on Lenix

1. jQuery determines whether the current state of an element is displayed or hidden $(“#id”).is(‘:visible’); //true is displayed, false is hidden $(“#id”).is(‘:hidden’); //true is hidden, false is displayed if($(“#id”).is(‘:hidden’)){ // logic code } 2. jQuery controls the display of css $(“#id”).show(); //Indicates display:block $(“#id”).hide(); //Indicates display:none $(“#id”).toggle(); //Toggle the visible state of the element $(“#id”).css(‘display’,’none’);

JavaScript has three types of popup boxes: alert boxes, confirmation boxes, and prompt boxes. 1. Warning box Alert boxes are often used if you want to ensure that information is passed on to the user. When the alert box pops up, the user will need to click OK to continue basic statement < script >

Problem introduction When importing the Vue project and using ‘ npm i ‘ to install node_moduels, the terminal error is as follows: Specifically this sentence: Cannot read properties of null (reading ‘pickAlgorithm’) Solution: Type in the terminal: npm cache clear –force npm cache clear –force Rerun the npm i command You can see on the

Bootstrap v5.2.0 is finally stable! We’ve fixed more bugs, improved more documentation, wrote new guides, built new functional environment examples, and more! Read on for beta and stable release highlights. Documentation redesign As we previewed in the beta, the documentation has been redesigned! It starts with our new home page , where we showcase Bootstrap’s

PHP 8.2 will be released on November 24, 2022 . In this post, we’ll walk through all the features, performance improvements, changes, and deprecations. # null , true , and false as separate types rfc PHP 8.2 adds three new types – or something like that. In this post, we’ll avoid going down the type

You can get the path to the executable to where node was installed with nvm which node Or any of the other NVM special aliases for node versions such as nvm which default … The post Where is the node installed by nvm? first appeared on Lenix Blog . This article is reprinted from https://blog.p2hp.com/archives/9141

Often because there are too many function modules on a page, such as a tab page. We want to write the function of each module in a js, but in order to distinguish, we define multiple $(function(){}) in a module, the function defined in $(function(){}) What will happen to the domain? Here are a few

1. Full traversal keys keys pattern We have already introduced it in the previous article, you can use it directly keys * There are 5 types of redis values, and different types have different commands to get them: Character directly get key Pop an element from the left end of the queue LPOP key Hash