任意输入 meaning in English

arbitrary input

Writing robust , error - free code that can handle arbitrary input requires both a great deal of attention to detail and many lines of code
编写能够处理任意输入的健壮、无错的代码，不仅需要非常关注细节，而且需要编写很多行代码。
If a validation error is detected in any of the input controls , the page itself is set to an invalid state so you can test for validity before your code runs
如果在任意输入控件中检测到验证错误，则该页面将自行设置为无效状态，以便在代码运行之前测试其有效性。