Javascript

How to select an element with its name attribute in jQuery

 

To select an element with its name attribute in jQuery you can use the snippet below.

Samples

Javascript Sample

if you remove the div in div[name=”de.Fesslersoft.Testname”] you will get all elements with the specific name.

You can also have a look at this JSFiddle.

If you have any questions or suggestions feel free to rate this snippet, post a comment or Contact Us via Email.

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How to check if an array contains a value in Javascript

 

To check if an array contains a value in Javascript you can use the snippet below.

Sample Javascript

Array.prototype.inArray = function (inputValue) {
	var counter;
	for (counter=0; counter < this.length; counter++) {
		if (this[counter] === inputValue) {
			return true;
		}
	}
	return false;
};

How to remove an element using Javascript

 

To remove an element using javascript, you can use one of the following snippets.

Sample Javascript

//usage document.getElementById("ElementId").remove();
Element.prototype.remove = function() {
	this.parentElement.removeChild(this);
}

Sample Javascript

//usage document.getElementsByClassName("Elements").remove();
NodeList.prototype.remove = HTMLCollection.prototype.remove = function() {
	for(var index = 0, length = this.length; index < length; index++) {
		if(this[index] && this[index].parentElement) {
			this[index].parentElement.removeChild(this[index]);
		}
	}
}

removeChild() is the only method supported by the DOM to remove a element in Javascript (see -> Mozilla MDN Node.removeChild()).

How to empty an array in Javascript

 

To empty an array in Javascript you can use the following methods.

Sample Javascript

myArray = [];

This code will set the variable A to a new empty array (take care if you have references to the “old” array).

or

myArray.length = 0

This will clear the existing array by setting its length to 0.

or

myArray.splice(0,myArray.length)

Working, but not recommended for this task. see Array.prototype.splice()

or

while(myArray.length > 0) {
    myArray.pop();
}

Fastest solution, without breaking references.

How to get selected value of dropdownlist using JavaScript

 

To get selected value of dropdownlist using JavaScript you can use the following snippet.

Sample Javascript

var dropDown = document.getElementById("MyDropDownId");
var dropdownValue = e.options[e.selectedIndex].value; //get the value
var dropdownText = e.options[e.selectedIndex].text; //get the text