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Limit number characters textarea
In this tutorial, I will let you know to count number of characters limit in textarea and show you the available remaining characters that you can enter in textarea using javascript.
Here we are taking a form with a textarea and an input field.
<form name=”dataform”>
<textarea name=”mytextarea” onKeyDown=”limitText(this.form.mytextarea,this.form.total,180);”
onKeyUp=”limitText(this.form.mytextarea,this.form.total,180);”>
</textarea><br>
(Maximum characters: 180)<br>
You have <input readonly type=”text” name=”total” value=”180″> characters left.
</form>
<textarea name=”mytextarea” onKeyDown=”limitText(this.form.mytextarea,this.form.total,180);”
onKeyUp=”limitText(this.form.mytextarea,this.form.total,180);”>
</textarea><br>
(Maximum characters: 180)<br>
You have <input readonly type=”text” name=”total” value=”180″> characters left.
</form>
Here we are using two event onKeyDown and onKeyUp and call a method limitText.We are passing three parameter.First parameter is the textarea, second parameter is used total number of character and last one is total limited number.
Now we are creating the function.
<script type=”text/javascript”>
function limitText(limitedField, limitedCount, limitedNum) {
if (limitedField.value.length > limitedNum) {
limitedField.value = limitedField.value.substring(0, limitedNum);
} else {
limitedCount.value = limitedNum – limitedField.value.length;
}
}
</script>
function limitText(limitedField, limitedCount, limitedNum) {
if (limitedField.value.length > limitedNum) {
limitedField.value = limitedField.value.substring(0, limitedNum);
} else {
limitedCount.value = limitedNum – limitedField.value.length;
}
}
</script>
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