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