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Inline-level Elements and Inline Boxes in CSS
Inline-level elements have their CSS display property set to either ‘inline, ‘inline-table’, or ‘inline-block’ and these elements do not force a line break above and below themselves. Inline-level boxes are generated by each inline-level element which is a part of the positioning scheme as well as contains child boxes.
Inline boxes are boxes which have their content follow inline formatting context. Inline boxes are split into a number of inline boxes whilst those inline boxes that are never split are called atomic inline-level boxes.
Anonymous inline boxes are those boxes over which developer has no control. If a block box contains some bare text and other inline-level boxes, then the bare text around inline-level boxes follows inline formatting context and is enclosed in anonymous inline boxes.
Inline-level vs block-level
The inline- level elements do not force line break above and below themselves and take up only the required width for the content. For example − Spans (<span>), Strong element (<strong>)
The block-level elements force line break above and below themselves and take up the available whole width even though their content doesn’t require it. For example: Divisions (<div>), Heading (<h1> to <h6>), etc.
Let’s see an example for inline level box generation −
Example
In this example, we will work around the inline level element <em> −
<!DOCTYPE html>
<html>
<head>
<title>em element</title>
<style>
form {
width:70%;
margin: 0 auto;
text-align: center;
}
* {
padding: 2px;
margin:5px;
}
input[type="button"] {
border-radius: 10px;
}
em{
background-color: #FF8A00;
}
</style>
</head>
<body>
<form>
<fieldset>
<legend>em-element</legend>
<label for="textSelect">Formatter: </label>
<input id="textSelect" type="text" placeholder="John Doe">
<input type="button" onclick="convertItalic()" value="Check">
<div id="divDisplay"></div>
</fieldset>
</form>
<script>
var divDisplay = document.getElementById("divDisplay");
var textSelect = document.getElementById("textSelect");
function convertItalic() {
for(i=0; i<2; i++){
var italicObject = document.createElement("EM");
var italicText = document.createTextNode(textSelect.value);
italicObject.appendChild(italicText);
divDisplay.appendChild(italicObject);
}
}
</script>
</body>
</html>
Example
In this example, we will work around the inline level element <span> −
<!DOCTYPE html>
<html>
<head>
<title>CSS Inline-level Elements and Inline Boxes</title>
<style>
form {
width:70%;
margin: 0 auto;
text-align: center;
}
* {
padding: 2px;
}
input[type="button"] {
border-radius: 10px;
}
.child{
color: white;
border: 4px solid black;
}
.child:nth-of-type(1){
background-color: #FF8A00;
}
.child:nth-of-type(2){
background-color: #F44336;
}
.child:nth-of-type(3){
background-color: #C303C3;
}
</style>
</head>
<body>
<form>
<fieldset>
<legend>CSS Inline-level Elements and Inline Boxes</legend>
<div><span class="child">Orange</span> Color<span class="child">Red</span> Color<span class="child">Violet</span> Color</div><br>
</fieldset>
</form>
</body>
</html>
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