jquery adds subordinate controls

In front-end development, we often need to add various controls to the page. In front-end development technology, jQuery is one of the most widely used js libraries, with many advantages such as ease of use, flexibility and scalability. This article mainly introduces how to use jQuery to add subordinate controls.

1. Add a drop-down box

In jQuery, you can easily create a drop-down list box through the select tag. You can add options to a select using the append method in jQuery.

For example, the following code adds an option element to a drop-down list box with an id of select through a loop.

<select id="select">
</select>

<script>
  for (var i = 1; i <= 10; i++) {
    $('#select').append('<option value="' + i + '">选项 ' + i + '</option>');
  }
</script>

The above code will add 10 options to select, with the value and display content of each option ranging from 1 to 10 respectively.

2. Add a checkbox

You can use the checkbox tag to easily create a checkbox in jQuery. You can add an input[type=checkbox] element to a checkbox container using the append method in jQuery.

For example, the following code adds a checkbox element to a container with the id checkbox-container through a loop.

<div id="checkbox-container">
</div>

<script>
  for (var i = 1; i <= 5; i++) {
    $('#checkbox-container').append('<input type="checkbox" id="checkbox' + i + '">');
    $('#checkbox-container').append('<label for="checkbox' + i + '">选项' + i + '</label>');
    $('#checkbox-container').append('<br>');
  }
</script>

The above code will add 5 checkboxes to a container, each checkbox has a corresponding label and newline character.

3. Add a radio button

You can use the radio tag to easily create a radio button in jQuery. You can add an input[type=radio] element to a radio button container using the append method in jQuery.

For example, the following code adds a radio element to a container with the id of radio-container through a loop.

<div id="radio-container">
</div>

<script>
  for (var i = 1; i <= 5; i++) {
    $('#radio-container').append('<input type="radio" name="radio" id="radio' + i + '">');
    $('#radio-container').append('<label for="radio' + i + '">选项' + i + '</label>');
    $('#radio-container').append('<br>');
  }
</script>

The above code will add 5 radio button boxes to a container, each radio button box has a corresponding label and line break. It should be noted that for radio button boxes, their name attributes need to be set to the same value so that the system can determine whether they belong to the same group.

4. Add input boxes

You can use the input tag to easily create various input boxes in jQuery. You can add input elements to the input box container using the append method in jQuery.

For example, the following code adds input[type=text] and textarea elements to a container with the id input-container through a loop.

<div id="input-container">
</div>

<script>
  $('#input-container').append('<input type="text" id="input1">');
  $('#input-container').append('<br>');
  $('#input-container').append('<textarea id="input2"></textarea>');
  $('#input-container').append('<br>');
</script>

The above code will add a text input box and a text field input box to a container.

Summary

The above is a brief introduction to using jQuery to add subordinate controls. By studying the content of this article, you can easily master how to use jQuery to extend page functionality. However, this is just the tip of the iceberg of jQuery applications. There is still a lot of rich content waiting for us to explore and use.

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