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In this video, you will learn how to copy text from html to clipboard using javascript.
Subscribe: https://www.youtube.com/channel/UCQsSmpR8i-A-tk3hyqWt_nw/featured
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In the previous chapters you've learnt how to select individual elements on a web page. But there are many occasions where you need to access a child, parent or ancestor element. See the JavaScript DOM nodes chapter to understand the logical relationships between the nodes in a DOM tree.
DOM node provides several properties and methods that allow you to navigate or traverse through the tree structure of the DOM and make changes very easily. In the following section we will learn how to navigate up, down, and sideways in the DOM tree using JavaScript.
You can use the firstChild
and lastChild
properties of the DOM node to access the first and last direct child node of a node, respectively. If the node doesn't have any child element, it returns null
.
<div id="main">
<h1 id="title">My Heading</h1>
<p id="hint"><span>This is some text.</span></p>
</div>
<script>
var main = document.getElementById("main");
console.log(main.firstChild.nodeName); // Prints: #text
var hint = document.getElementById("hint");
console.log(hint.firstChild.nodeName); // Prints: SPAN
</script>
Note: The
nodeName
is a read-only property that returns the name of the current node as a string. For example, it returns the tag name for element node,#text
for text node,#comment
for comment node,#document
for document node, and so on.
If you notice the above example, the nodeName
of the first-child node of the main DIV element returns #text instead of H1. Because, whitespace such as spaces, tabs, newlines, etc. are valid characters and they form #text nodes and become a part of the DOM tree. Therefore, since the <div>
tag contains a newline before the <h1>
tag, so it will create a #text node.
To avoid the issue with firstChild
and lastChild
returning #text or #comment nodes, you could alternatively use the firstElementChild
and lastElementChild
properties to return only the first and last element node, respectively. But, it will not work in IE 9 and earlier.
<div id="main">
<h1 id="title">My Heading</h1>
<p id="hint"><span>This is some text.</span></p>
</div>
<script>
var main = document.getElementById("main");
alert(main.firstElementChild.nodeName); // Outputs: H1
main.firstElementChild.style.color = "red";
var hint = document.getElementById("hint");
alert(hint.firstElementChild.nodeName); // Outputs: SPAN
hint.firstElementChild.style.color = "blue";
</script>
Similarly, you can use the childNodes
property to access all child nodes of a given element, where the first child node is assigned index 0. Here's an example:
<div id="main">
<h1 id="title">My Heading</h1>
<p id="hint"><span>This is some text.</span></p>
</div>
<script>
var main = document.getElementById("main");
// First check that the element has child nodes
if(main.hasChildNodes()) {
var nodes = main.childNodes;
// Loop through node list and display node name
for(var i = 0; i < nodes.length; i++) {
alert(nodes[i].nodeName);
}
}
</script>
The childNodes
returns all child nodes, including non-element nodes like text and comment nodes. To get a collection of only elements, use children
property instead.
<div id="main">
<h1 id="title">My Heading</h1>
<p id="hint"><span>This is some text.</span></p>
</div>
<script>
var main = document.getElementById("main");
// First check that the element has child nodes
if(main.hasChildNodes()) {
var nodes = main.children;
// Loop through node list and display node name
for(var i = 0; i < nodes.length; i++) {
alert(nodes[i].nodeName);
}
}
</script>
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In this small tutorial I will explain you how to copy text from one field to another field using java script, many time we have requirement to copy text value one field to another field, like current address and permanent address are same in this criteria copy to clipboard is useful to save our time.
Thanks for the reading…!!
#copy #clipboard #jquery #javascript #php #copy to clipboard jquery
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In this video, I will be showing you how to turn text into speech in Node.js
#javascript #text to speech #javascript api #text to speech app #node.js text to speech #javascript text to speech
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Image Uploader with Preview || Html CSS JavaScript || #html #css #javascript #coding
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HTML stands for a hypertext markup language. For the designs to be displayed in web browser HTML is the markup language. Technologies like Cascading style sheets (CSS) and scripting languages such as JavaScript assist HTML. With the help of HTML websites and the web, designs are created. Html has a wide range of academic applications. HTML has a series of elements. HTML helps to display web content. Its elements tell the web how to display the contents.
The document component of HTML is known as an HTML element. HTML element helps in displaying the web pages. An HTML document is a mixture of text nodes and HTML elements.
The simple fundamental components oh HTML is
HTML helps in creating web pages. In web pages, there are texts, pictures, colouring schemes, tables, and a variety of other things. HTML allows all these on a web page.
There are a lot of attributes in HTML. It may get difficult to memorize these attributes. HTML is a tricky concept. Sometimes it gets difficult to find a single mistake that doesn’t let the web page function properly.
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