How to set the value of text box in javascript

In Javascript, to set the value of a text box, you can do so by accessing the properties of the text box object. The text box object can be obtained through the ID value of the text box, and then its properties can be operated.

The common ways to set the value of a text box in Javascript are as follows:

1. Set the value of the text box through the value attribute of the text box

The value attribute of the text box object can get or set the value of the text box. You can set the value of the text box in the following way:

document.getElementById("myText").value = "Hello World!";

Among them, myText is the ID value of the text box, and "Hello World!" Set the value of the text box.

2. Set the value of the text box through the innerHTML attribute

The text box object can also access the innerHTML attribute, which can get or set the content of the element (including the text box). As shown below:

document.getElementById("myText").innerHTML = "Hello World!";

3. Set the value of the text box through the setAttribute method

setAttribute is a general method for setting element attributes. This method accepts two parameters: the value to be set Property name and property value. As shown below:

document.getElementById("myText").setAttribute("value", "Hello World!");

In addition to the value attribute, you can also set other attributes, such as id, name, etc.

4. Set the value of the text box through the text attribute

The text attribute can get or set the text content of the text box. As shown below:

document.getElementById("myText").text = "Hello World!";

It should be noted that the text attribute cannot be used with textarea elements and can only be used with input elements.

5. Set the value of the text box through the innerText or textContent property

The innerText or textContent property can set the text content of the element or get the text content of the element. As shown below:

// innerText
document.getElementById("myText").innerText = "Hello World!";

// textContent
document.getElementById("myText").textContent = "Hello World!";

It should be noted that the innerText or textContent attribute may be implemented differently in different browsers.

Summary:

The above are common ways to set the value of a text box in Javascript. Through these methods, the value of the text box can be easily set to meet the needs of different businesses. It is necessary to choose the appropriate method according to actual needs.

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