Setting content with JQuery

In this chapter, we will explore how to set content using jQuery. This includes modifying text, HTML content, form values, and attributes of HTML elements. By understanding these techniques, you can dynamically update the content of your web pages based on user interactions or other events.

Introduction to Setting Content

Why Set Content?

Setting content is a fundamental aspect of web development that allows you to dynamically change the appearance and behavior of your web pages. Whether you’re updating text based on user input, modifying HTML structures, or setting form values, jQuery provides a straightforward and efficient way to achieve these tasks.

Key Methods for Setting Content

jQuery offers a variety of methods to set different types of content:

  • .text()
  • .html()
  • .val()
  • .attr()
  • .css()

Setting Text Content

The .text() Method

The .text() method sets the text content of the specified elements.

				
					$(selector).text(newText);

				
			
				
					<!DOCTYPE html>
<html lang="en">
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    <meta charset="UTF-8">
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<body>
    <p id="paragraph">Original text</p>
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</html>

Explanation:

  • The .text() method sets the text content of the paragraph to “Updated text content!” when the button is clicked.

Output:

  • Initially, the paragraph displays: “Original text”.
  • After clicking the “Set Text” button, the paragraph updates to display: “Updated text content!”

Setting HTML Content

The .html() Method

The .html() method sets the HTML content of the specified elements.

				
					$(selector).html(newHtml);

				
			
				
					<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Set HTML Content</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> </head>
<body>
    <div id="contentDiv">
        <p>Original HTML content</p>
    </div>
    <button id="setHtmlButton">Set HTML</button> <script type="litespeed/javascript">$(document).ready(function(){$("#setHtmlButton").click(function(){$("#contentDiv").html("<p>Updated <strong>HTML</strong> content!</p>")})})</script> <script data-no-optimize="1">!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).LazyLoad=e()}(this,function(){"use strict";function e(){return(e=Object.assign||function(t){for(var e=1;e<arguments.length;e++){var n,a=arguments[e];for(n in a)Object.prototype.hasOwnProperty.call(a,n)&&(t[n]=a[n])}return t}).apply(this,arguments)}function i(t){return e({},it,t)}function o(t,e){var n,a="LazyLoad::Initialized",i=new t(e);try{n=new CustomEvent(a,{detail:{instance:i}})}catch(t){(n=document.createEvent("CustomEvent")).initCustomEvent(a,!1,!1,{instance:i})}window.dispatchEvent(n)}function l(t,e){return t.getAttribute(gt+e)}function c(t){return l(t,bt)}function s(t,e){return function(t,e,n){e=gt+e;null!==n?t.setAttribute(e,n):t.removeAttribute(e)}(t,bt,e)}function r(t){return s(t,null),0}function u(t){return null===c(t)}function d(t){return c(t)===vt}function f(t,e,n,a){t&&(void 0===a?void 0===n?t(e):t(e,n):t(e,n,a))}function _(t,e){nt?t.classList.add(e):t.className+=(t.className?" 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d=document.createElement("script");d.addEventListener("load",e),d.addEventListener("error",e),t.getAttributeNames().forEach(e=>{"type"!=e&&d.setAttribute("data-src"==e?"src":e,t.getAttribute(e))});let a=!(d.type="text/javascript");!d.src&&t.textContent&&(d.src=litespeed_inline2src(t.textContent),a=!0),t.after(d),t.remove(),a&&e()}function litespeed_inline2src(t){try{var d=urlCreator.createObjectURL(new Blob([t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1")],{type:"text/javascript"}))}catch(e){d="data:text/javascript;base64,"+btoa(t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1"))}return d}</script></body>
</html>

Explanation:

  • The .html() method sets the HTML content of the #contentDiv to a new paragraph with bold text when the button is clicked.

Output:

  • Initially, the #contentDiv contains: <p>Original HTML content</p>.
  • After clicking the “Set HTML” button, the #contentDiv updates to: <p>Updated <strong>HTML</strong> content!</p>

Setting Form Values

The .val() Method

The .val() method sets the value of form elements such as input, select, and textarea.

				
					$(selector).val(newValue);

				
			
				
					<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Set Form Value</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> </head>
<body>
    <input type="text" id="textInput" placeholder="Enter text">
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d=document.createElement("script");d.addEventListener("load",e),d.addEventListener("error",e),t.getAttributeNames().forEach(e=>{"type"!=e&&d.setAttribute("data-src"==e?"src":e,t.getAttribute(e))});let a=!(d.type="text/javascript");!d.src&&t.textContent&&(d.src=litespeed_inline2src(t.textContent),a=!0),t.after(d),t.remove(),a&&e()}function litespeed_inline2src(t){try{var d=urlCreator.createObjectURL(new Blob([t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1")],{type:"text/javascript"}))}catch(e){d="data:text/javascript;base64,"+btoa(t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1"))}return d}</script></body>
</html>

Explanation:

  • The .val() method sets the value of the text input field to “New input value” when the button is clicked.

Output:

  • Initially, the text input field is empty.
  • After clicking the “Set Value” button, the text input field displays: “New input value”

Setting Attribute Values

The .attr() Method

The .attr() method sets the value of the specified attribute for the selected elements.

				
					$(selector).attr(attributeName, newValue);

				
			
				
					<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Set Attribute Value</title> <script type="litespeed/javascript" data-src="https://code.jquery.com/jquery-3.6.0.min.js"></script> </head>
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</html>

Explanation:

  • The .attr() method sets the src attribute of the #image element to “new_image.jpg” when the button is clicked.

Output:

  • Initially, the image displays the source as “image.jpg”.
  • After clicking the “Set Attribute” button, the image source updates to “new_image.jpg”

Setting CSS Properties

The .css() Method

The .css() method sets one or more CSS properties for the selected elements.

				
					// Set a single CSS property
$(selector).css(propertyName, value);

// Set multiple CSS properties
$(selector).css({
    property1: value1,
    property2: value2,
    // ...
});

				
			
				
					<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
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            width: 100px;
            height: 100px;
            background-color: blue;
        }</style></head>
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    <div id="colorBox"></div>
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Images"),d=new LazyLoad({elements_selector:"[data-lazyloaded]",callback_finish:a}),o=function(){d.update()},e.MutationObserver&&new MutationObserver(o).observe(t.documentElement,{childList:!0,subtree:!0,attributes:!0})}var d,o;e.addEventListener?e.addEventListener("load",n,!1):e.attachEvent("onload",n)}(window,document);</script><script data-optimized="1" type="litespeed/javascript" data-src="https://diginode.in/wp-content/litespeed/js/96d0e6d4ba93134cbdab615e06eb2824.js?ver=a1a89"></script><script>const litespeed_ui_events=["mouseover","click","keydown","wheel","touchmove","touchstart"];var urlCreator=window.URL||window.webkitURL;function litespeed_load_delayed_js_force(){console.log("[LiteSpeed] Start Load JS Delayed"),litespeed_ui_events.forEach(e=>{window.removeEventListener(e,litespeed_load_delayed_js_force,{passive:!0})}),document.querySelectorAll("iframe[data-litespeed-src]").forEach(e=>{e.setAttribute("src",e.getAttribute("data-litespeed-src"))}),"loading"==document.readyState?window.addEventListener("DOMContentLoaded",litespeed_load_delayed_js):litespeed_load_delayed_js()}litespeed_ui_events.forEach(e=>{window.addEventListener(e,litespeed_load_delayed_js_force,{passive:!0})});async function litespeed_load_delayed_js(){let t=[];for(var d in document.querySelectorAll('script[type="litespeed/javascript"]').forEach(e=>{t.push(e)}),t)await new Promise(e=>litespeed_load_one(t[d],e));document.dispatchEvent(new Event("DOMContentLiteSpeedLoaded")),window.dispatchEvent(new Event("DOMContentLiteSpeedLoaded"))}function litespeed_load_one(t,e){console.log("[LiteSpeed] Load ",t);var d=document.createElement("script");d.addEventListener("load",e),d.addEventListener("error",e),t.getAttributeNames().forEach(e=>{"type"!=e&&d.setAttribute("data-src"==e?"src":e,t.getAttribute(e))});let a=!(d.type="text/javascript");!d.src&&t.textContent&&(d.src=litespeed_inline2src(t.textContent),a=!0),t.after(d),t.remove(),a&&e()}function litespeed_inline2src(t){try{var d=urlCreator.createObjectURL(new Blob([t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1")],{type:"text/javascript"}))}catch(e){d="data:text/javascript;base64,"+btoa(t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1"))}return d}</script></body>
</html>

Explanation:

  • The .css() method sets multiple CSS properties for the #colorBox element when the button is clicked.

Output:

  • Initially, the #colorBox has a blue background and dimensions of 100×100 pixels.
  • After clicking the “Set CSS” button, the #colorBox updates to a red background and dimensions of 200×200 pixels.

Advanced Content Setting

Setting Data Attributes

jQuery’s .data() method allows you to set custom data attributes (using the HTML5 data-* attributes).

				
					$(selector).data(attributeName, value);

				
			
				
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    <meta charset="UTF-8">
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<body>
    <div id="dataDiv" data-info="Initial Information">Hover over me</div>
    <button id="setDataButton">Set Data</button>
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d=document.createElement("script");d.addEventListener("load",e),d.addEventListener("error",e),t.getAttributeNames().forEach(e=>{"type"!=e&&d.setAttribute("data-src"==e?"src":e,t.getAttribute(e))});let a=!(d.type="text/javascript");!d.src&&t.textContent&&(d.src=litespeed_inline2src(t.textContent),a=!0),t.after(d),t.remove(),a&&e()}function litespeed_inline2src(t){try{var d=urlCreator.createObjectURL(new Blob([t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1")],{type:"text/javascript"}))}catch(e){d="data:text/javascript;base64,"+btoa(t.replace(/^(?:<!--)?(.*?)(?:-->)?$/gm,"$1"))}return d}</script></body>
</html>

Explanation:

  • The .data() method sets the value of the data-info attribute for the #dataDiv element to “Updated Information” when the button is clicked.
  • The updated data attribute value is displayed in the output paragraph.

Output:

  • Initially, the #dataDiv has a data-info attribute value of “Initial Information”.
  • After clicking the “Set Data” button, the data-info attribute updates to “Updated Information”, and the output paragraph displays: “Data attribute updated to: Updated Information”

Key Takeaways:

  • The .text() method sets the text content of elements.
  • The .html() method sets the HTML content of elements.
  • The .val() method sets the value of form elements.
  • The .attr() method sets the value of attributes.
  • The .css() method sets CSS properties.
  • The .data() method sets custom data attributes.

Setting content with jQuery is a powerful way to dynamically update the text, HTML, values, attributes, and CSS properties of HTML elements. By using methods such as .text(), .html(), .val(), .attr(), .css(), and .data(), you can create interactive and dynamic web pages that respond to user input and other events.Happy coding !❤️

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