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This article mainly introduces "input how to limit input length records". In daily operation, I believe many people have doubts about how input limits input length records. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts of "how input limits input length records". Next, please follow the editor to study!

Problem description: input input box length limit & irregular expression mode-type = "number"-> input type oninput-> {the oninput event is triggered when the user types. This event is triggered when the value of the or element changes. Tip: this event is similar to the onchange event. The difference is that the oninput event is triggered immediately when the value of the element changes, and onchange is triggered when the element loses focus. Another difference is that the onchange event can also act on the and element} value.slice (start,end) return''; parameter description start is required. Specify where to start the selection. If it is negative, it specifies the position from the end of the array. That is,-1 refers to the last element,-2 refers to the penultimate element, and so on. End is optional. Specifies where to end the selection. This parameter is the array subscript at the end of the array fragment. If this parameter is not specified, the shredded array contains all the elements from start to the end of the array. If this parameter is negative, it specifies the element starting at the end of the array.

Note: if end is not specified, the slice () method selects all elements from start to the end of the array.

Please go to the official website to learn the specific usage!

Mode II maxlength attribute-> {maxlength attribute specifies the maximum length of the input field, in terms of the number of characters. The maxlength attribute is used with or with} return'; at this point, the study of "how input restricts input length records" is over, hoping to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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