Примеры для jQuery .slice()

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Turns divs yellow based on a random slice.

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>slice demo</title>
  <style>
  div {
    width: 40px;
    height: 40px;
    margin: 10px;
    float: left;
    border: 2px solid blue;
  }
  span {
    color: red;
    font-weight: bold;
  }
  button {
    margin: 5px;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<p><button>Turn slice yellow</button>
  <span>Click the button!</span></p>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
  <div></div>
 
<script>
function colorEm() {
  var $div = $( "div" );
  var start = Math.floor( Math.random() * $div.length );
  var end = Math.floor( Math.random() * ( $div.length - start ) ) +
    start + 1;
  if ( end === $div.length ) {
    end = undefined;
  }
  $div.css( "background", "" );
  if ( end ) {
    $div.slice( start, end ).css( "background", "yellow" );
  } else {
    $div.slice( start ).css( "background", "yellow" );
  }
  $( "span" ).text( "$( 'div' ).slice( " + start +
    (end ? ", " + end : "") +
    ").css( 'background', 'yellow' );" );
}
 
$( "button" ).click( colorEm );
</script>
 
</body>
</html>

Демонстрация:

Selects all paragraphs, then slices the selection to include only the first element.

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$( "p" ).slice( 0, 1 ).wrapInner( "<b></b>" );

Selects all paragraphs, then slices the selection to include only the first and second element.

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$( "p" ).slice( 0, 2 ).wrapInner( "<b></b>" );

Selects all paragraphs, then slices the selection to include only the second element.

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$( "p" ).slice( 1, 2 ).wrapInner( "<b></b>" );

Selects all paragraphs, then slices the selection to include only the second and third element.

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$( "p" ).slice( 1 ).wrapInner( "<b></b>" );

Selects all paragraphs, then slices the selection to include only the third element.

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$( "p" ).slice( -1 ).wrapInner( "<b></b>" );