{"id":5334,"date":"2021-11-25T04:25:47","date_gmt":"2021-11-25T04:25:47","guid":{"rendered":"https:\/\/studysection.com\/blog\/?p=5334"},"modified":"2021-11-25T05:06:03","modified_gmt":"2021-11-25T05:06:03","slug":"javascript-loading-div-is-displayed-only-when-the-debugger-is-on","status":"publish","type":"post","link":"https:\/\/studysection.com\/blog\/javascript-loading-div-is-displayed-only-when-the-debugger-is-on\/","title":{"rendered":"Javascript | Loading div is displayed only when the debugger is on"},"content":{"rendered":"

Problem:-<\/strong> I have added a loader div with id \u201cspin-loader\u201d<\/em><\/strong> on my web page to show processing of code. Its default style is display:none<\/em><\/strong>. Whenever I need to do any code processing, I start with jquery<\/a> code as shown below:
\nfunction someFun() {
\n $('#spin-loader').show();
\n \/\/ ajax code
\n \/\/ some javascript or jquery processing
\n $('#spin-loader').hide();
\n}<\/code><\/p>\n

I was facing a weird issue in this. Normally, it works perfectly. Loading icon div<\/em><\/strong> is displayed as it is the first line whenever someFun()<\/em><\/strong> function is called and it is hidden when ajax or normal javascript code processing is completed due to the last line inside function someFun()<\/em><\/strong>. The div having id \u201cspin-loader\u201d<\/em><\/strong> has my own CSS properties to show some code under processing.<\/p>\n

For a lot of pages, it worked. But for one page, it didn\u2019t work. Loading icon div<\/strong> is not displayed, but ajax and javascript code worked. Without Loading icon div<\/em><\/strong>, we never know code is in progress. The page should become a little faded and elements of the page should not be clickable until code is in progress. But, due to the CSS of the loader div being not changed to \u201cdisplay:block\u201d<\/em><\/strong>, the user can click anywhere on the page.
\nLet\u2019s see how I resolved the issue.<\/p>\n

Solution<\/h2>\n

First I added a line debugger; at the start to check whether the loader div<\/em><\/strong> becomes visible or not. My code becomes as follows:
\nfunction someFun() {
\n debugger;
\n $('#spin-loader').show();
\n \/\/ ajax code
\n \/\/ some javascript or jquery processing
\n $('#spin-loader').hide();
\n}<\/code><\/p>\n

While testing, the developer tool<\/strong> where the console tab is displayed should be open.
\nDuring testing, I observed that it processes the line $(‘#spin-loader’).show();<\/em> and loader div is displayed. But whenever I remove the line debugger; , the loading div does not become visible whenever the function someFun()<\/em><\/strong> is called.<\/p>\n

Then I modify the code as follows and it worked:<\/strong>
\nfunction someFun() {
\n $('#spin-loader').show();
\n setTimeout(function() {
\n \/\/ ajax code
\n \/\/ some javascript or jquery processing
\n $('#spin-loader').hide();
\n }, 10);
\n}<\/code><\/p>\n

I put the whole code inside the setTimeout()<\/em><\/strong> function except the first line. Maybe the browser is busy with heavy code work and it didn\u2019t process the first line. When I gave a few 10ms which is very very small, then the first line was also executed and the rest of the code also worked perfectly.<\/p>\n

Problem:- I have added a loader div with id \u201cspin-loader\u201d on my web page to show processing of code. Its<\/p>\n","protected":false},"author":1,"featured_media":5335,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[739,199],"acf":[],"yoast_head":"\nJavascript | Loading div is displayed when the debugger is on - SS Blog<\/title>\n<meta name=\"description\" content=\"For a lot of pages, it worked. But for one page, it didn\u2019t work. 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