How to Set the Size of an HTML Text Box

how do you increase the height of an html textbox

I'm assuming from the way you worded the question that you want to change the size after the page has rendered?

In Javascript, you can manipulate DOM CSS properties, for example:

document.getElementById('textboxid').style.height="200px";
document.getElementById('textboxid').style.fontSize="14pt";

If you simply want to specify the height and font size, use CSS or style attributes, e.g.

//in your CSS file or <style> tag
#textboxid
{
    height:200px;
    font-size:14pt;
}

<!--in your HTML-->
<input id="textboxid" ...>

Or

<input style="height:200px;font-size:14pt;" .....>

How do I set the size of an HTML text box?

Just use:

textarea {
    width: 200px;
}

or

input[type="text"] {
    width: 200px;
}

Depending on what you mean by 'textbox'.

How do I make the text box bigger in HTML/CSS?

According to this answer, here is what it says:

In Javascript, you can manipulate DOM CSS properties, for example:

document.getElementById('textboxid').style.height="200px";
document.getElementById('textboxid').style.fontSize="14pt";

If you simply want to specify the height and font size, use CSS or style attributes, e.g.

//in your CSS file or <style> tag
#textboxid
{
    height:200px;
    font-size:14pt;
}

<!--in your HTML-->
<input id="textboxid" ...>

Or

<input style="height:200px;font-size:14pt;" .....>

How can the size of an input text box be defined in HTML?

You could set its width:

<input type="text" id="text" name="text_name" style="width: 300px;" />

or even better define a class:

<input type="text" id="text" name="text_name" class="mytext" />

and in a separate CSS file apply the necessary styling:

.mytext {
    width: 300px;
}

If you want to limit the number of characters that the user can type into this textbox you could use the maxlength attribute:

<input type="text" id="text" name="text_name" class="mytext" maxlength="25" />

Change size of text in text input tag?

<input style="font-size:25px;" type="text"/>

The above code changes the font size to 25 pixels.

input size.. does not change the size of input field

How to correctly set the size of field?

In HTML5 You should be using CSS, however both size in the HTML and CSS rules will work, but the CSS will over-rule any size value given.

CSS has a special unit called the ch unit. (see here and here) which is valid in all current browsers (except Opera Mini).

Further, the character width default should be defined by a font-size CSS element somewhere in the DOM hierarchy.

input[type=text]{  /* Set width to 40characters */  width: 40ch;  /* prevent overflow of container */  max-width: 100%; }

<input class="w3-input w3-border" name="lastName" type="text" id="myInput" onkeyup="myFunction()" placeholder="Search for last names.." title="Type in a last name">

How to change textbox size(height) if text size increses?

You can use textarea
to show or get your long text values like that

<textarea  cols="40" rows="5" style="resize:none" name="address">
"502, Venus Atlantis, Nr. Shell Petrol Pump, Anandnahar-Prahladnagar Road, Ahmedabad,Gujarat, India"
</textarea>

Cols will change horizantal and Rows will change vertical length of input. Also you can use ReadOnly=true if you want to not implement an input but an output element instead of this.

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