HTML5: How to specify that an input field must be filled out before submitting the form?

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Solution :

HTML Code:

<!DOCTYPE html>
  <meta charset="utf-8">
  <title>How to specify that an input field must be filled out before submitting the form</title>
<form method="post" action="https://www.w3resource.com/html-css-exercise/basic/solution/input-required-answer-demo.php">
Telephone No: <input type="number" name="phone_no" required>
  <input type="submit">

Live Demo:

See the Pen input-required-answer by w3resource (@w3resource) on CodePen.

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HTML-CSS: Tips of the Day

HTML 5 strange img always adds 3px margin at bottom:

This problem is caused by the image behaving like a character of text (and so leaving a space below it where the hanging part of a "y" or "g" would go), and is solved by using the vertical-align CSS property to indicate that no such space is needed. Almost any value of vertical-align will do; I'm fond of middle, personally.

img {
    vertical-align: middle;

Ref: https://bit.ly/2OOQoq1


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