امثلة عن ال jQuery باستخدام توابع الفلترة

2021-03-27
daafoor

مثال عن استخدام التابع first:

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("div").first().css("background-color", "yellow");
});
</script>
</head>
<body>

<h1>Welcome to My Homepage</h1>

<p>This is a paragraph.</p>

<div style="border: 1px solid black;">
  <p>A paragraph in a div.</p>
  <p>Another paragraph in a div.</p>
</div>
<br>

<div style="border: 1px solid black;">
  <p>A paragraph in another div.</p>
  <p>Another paragraph in another div.</p>
</div>
<br>

<div style="border: 1px solid black;">
  <p>A paragraph in another div.</p>
  <p>Another paragraph in another div.</p>
</div>
</body>
</html>

مثال عن استخدام التابع last:

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("div").last().css("background-color", "yellow");
});
</script>
</head>
<body>

<h1>Welcome to My Homepage</h1>

<p>This is a paragraph.</p>

<div style="border: 1px solid black;">
  <p>A paragraph in a div.</p>
  <p>Another paragraph in a div.</p>
</div>
<br>

<div style="border: 1px solid black;">
  <p>A paragraph in another div.</p>
  <p>Another paragraph in another div.</p>
</div>
<br>

<div style="border: 1px solid black;">
  <p>A paragraph in another div.</p>
  <p>Another paragraph in another div.</p>
</div>

</body>
</html>

مثال عن استخدام التابع filter:

<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
$(document).ready(function(){
  $("p").filter(".intro").css("background-color", "yellow");
});
</script>
</head>
<body>

<h1>Welcome to My Homepage</h1>

<p>My name is Donald.</p>
<p class="intro">I live in Duckburg.</p>
<p class="intro">I love Duckburg.</p>
<p>My best friend is Mickey.</p>

</body>
</html>