jquery validate input box should not turn red

In web development, form validation is a very important link. The jquery validate plug-in can easily help us implement form validation functions. During the form validation process, when the input does not meet the requirements, the plug-in will turn the border of the input box red to prompt the user that the input is incorrect. However, in some cases, we want the input box not to turn red, but to maintain the original border color.

This article will introduce how to use the jquery validate plug-in to implement the form validation function without the input box becoming red.

1. Introduction to jquery validate plug-in

jquery validate is a very popular form validation plug-in. It provides a very rich set of validation rules and related functions, which can help us quickly implement form validation functions. For specific usage and related instructions, please refer to the plug-in documentation.

2. Disable the default error prompt

In the jquery validate plug-in, the default error prompt method is to turn the border of the input box into red and insert the error prompt information below the input box. If we want to disable this error prompt, we need to set some parameters when initializing the plug-in.

Specifically, we need to disable the default error prompt by setting the highlight and unhighlight parameters. The highlight parameter is used to set the style of the input box when an error occurs, and the unhighlight parameter is used to set the style of the input box when it returns to normal. We can set an empty callback function in these two parameters to disable the plugin's default style.

For example:

$("form").validate({
  highlight: function(element) {
    // do nothing
  },
  unhighlight: function(element) {
    // do nothing
  }
});

With the above settings, the input box will not turn red when there is an error, and it will not change when it returns to normal.

3. Customized error prompting method

Although the default error prompting method is very convenient, it may not be applicable in some cases. In this case, we can use some callback functions provided by jquery validate to customize the error prompting method.

Specifically, jquery validate provides two callback functions, errorPlacement and showErrors, for customizing error prompts. The errorPlacement function is used to determine the location of the error message, and the showErrors function is used to display the error message.

For example:

$("form").validate({
  errorPlacement: function(error, element) {
    // 自定义错误提示信息位置
    error.appendTo(element.parent());
  },
  showErrors: function(errorMap, errorList) {
    // 自定义错误提示信息显示
    var error = errorList[0];
    var element = $(error.element);
    element.addClass("error");
    element.next(".error-message").text(error.message);
  }
});

Through the above settings, we can customize the position and style of the error message to achieve specific visual effects.

4. Use CSS style control

In some cases, we can set the CSS style to prevent the input box from turning red.

For example:

input.error {
  /* 输入框出错时的样式 */
  /* do something here */
}

input.valid {
  /* 输入框恢复正常时的样式 */
  /* do something here */
}

By setting the above style, we can control the style of the input box so that the input box does not become red.

5. Summary

During the form verification process, the input box turning red is a common error prompt. However, in some cases, we want the input box not to turn red, but to maintain the original border color. This article introduces several form validation methods to prevent the input box from turning red, including disabling the default error prompt, customizing the error prompt, and using CSS style control. Which method to choose depends on actual needs and personal preferences.

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