Here we have a progress element, with 100 as max and 50 as it’s value. This way, the progress bar indicates that the progress is 50% complete. Also there is a text between the progress tag, which is used as a fall back text for browsers which do not yet support progress element of HTML5.
Change the number present in value and max attribute and look at the visual effect/indication of the progress on the browser.
Note: In real production server, you need not use two input fields as shown in this video tutorial. You can simply make use of the color input type and once you submit the form, you’ll get hexadecimal code value in place of the color input field. If you have a large audience still using Internet Explorer or other older browsers, then you can use jQuery plugin to accomplish the same task across all major browsers.
Browsers which support range input type know that the field is used for entering a number with in a given range.
User Interface(UI) enhancement wise, you may get a slider control to select a range of number. You can even use min, max and step attributes to provide additional control for the field – for setting the range.
Here we have 2 input fields of type range and number respectively. Both having minimum allowed value as 2 and maximum allowed value as 10, and a step of 0.2 (fractional value). The number input field is taken for the sake of illustrating the value selected by the user using the range input field – by using(sliding) the slider.
var get = document.getElementById("get").value;
document.getElementById("put").value = get;
Here we fetch the value selected by the user using the slider and assign the value to the number input field.
Note: Browsers which do not support range input type, simply fall back to text input type. However, you need to validate the user entered data at server-side for more security. Client side validation is done mainly for the sake of creating the illustration of speed of validating the data and for a better user experience.
number input type indicates that the input field is used for entering numbers.
Advantages of using number input type: 1. Browsers which support HTML5, provides useful user interface enhancement by providing up and down arrow/tickers to increment and decrement the number. 2. You get a customized keyboard which is optimized for numeric inputs on mobile devices which supports number input type. 3. Using attributes like min, max and step, you can have more control. You can specify the minimum, maximum values the field takes and also you can specify the step for incrementing and decrementing the number using arrow marks. 4. Basic validation to check if the user entered numeric value or not.
Note: Browsers which do not support number input type, simply fall back to text input type, so you can go ahead and implement number input type in your projects without worrying. It’s a good practice to even validate the code at server-side, since browsers can be easily tricked and wrong entries can be made using form elements.
In this video, I’ll show you that there are no interface changes to tel type input fields. And there are no actual behavioural changes too.
Only advantages, as for now, with tel type input fields are: 1. Screen readers pickup these tel type input fields and hint the visually challenged people that they need to enter their telephone number in the input field. 2. Mobile device browsers which are optimized to work for HTML5, will show up a customized keyboard to the user to enter telephone number rather than the regular text based keyboard.
Note: tel type input fields do not validate the user input to check if she entered a telephone number or a random text. Because a telephone number has a wide range of acceptance – like including a hyphen or the number of digits in a phone number vary etc..
It doesn’t ping the entered URL to check if the URL is actually present or not. It simply checks to make sure the user entered information starts with http:// and ends with a dot followed by a valid TLD.
If viewed on a HTML5 compatible mobile browser, it pops up custom keyboard to facilitate the user to enter URL.
It doesn’t validate the email address completely. Infact, it doesn’t check if the entered email address is actually a real email address or a dummy one. It simply checks for minimal thing in the entered text to determine if it is an email address or not – like @ symbol and a valid TLD(Top Level Domain) extension.
Also on mobile devices, when it encounters these email input type, user is prompted with keypad that aids in entering email address – like the @ symbol present on the same screen and need not to navigate to special symbols section on the keypad.
Before HTML5 we were using select() method to select the entire text/string present in the input field. We did not have more control to specify the selection start and end points ourselves. With HTML5 text selection API’s we could specify selection start and end points.
Here we have a input box with some pre-populated text/string inside it. We also have a button, clicking on which we invoke txtSelect() method.
var input = document.getElementById("name");
We select the input field by it’s id. Then, by using select() method we select the entire text present inside the input field. This is the old school method we used to select the text even before HTML5.
require attribute forces the user to enter some value. But it does not validate the user input. Example: It makes sure if the email field has some value in it but doesn’t check if the user has entered valid email address or not. It only makes sure, the required field isn’t left empty.
Server side validation is also equally important. Because someone might directly pass the value via the script present in the action field of form tag – if form uses GET method to pass user data.
Today let us learn about novalidate and formnovalidate attributes of HTML5 form.
In this video tutorial I’m taking 2 input fields and making one input field as required. Also take 2 submit buttons, with one validating the user entered data and the other one bypassing the validation rules set.
Why would we ever need novalidation for forms ?
Sometimes we enter a lengthy form and submit, but due to some validation mistakes all our entries gets erased, and the user may not have the patience to re-enter everything from beginning. He may skip it altogether. To avoid that, you can build an interface wherein user can save her data first and then can submit it after reviewing it. In such a situation we can make use of a temporary database table to store user entered information and display for review with appropriate messages to correct the wrong inputs – user can correct them and Submit.
Note:^ symbol specifies the beginning and the $ symbol specifies the end of the input value.
You can share any simple/small to complex/big regular expression knowledge in the comment section below. Your time and effort is highly appreciated. Your knowledge and inputs will surely be helpful to many people around the world. Comment section is all yours