Questions about submitting data

Does the data to be submitted have to be placed in the input tag or textarea tag? Wouldn't it work if I put it in another label? For example, why doesn't the span tag work? What should I do if it is inconvenient to use input or textarea?

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Does the data to be submitted have to be placed in the input tag or textarea tag? Wouldn't it work if I put it in another label? For example, why doesn't the span tag work? What should I do if it is inconvenient to use input or textarea?

It’s also possible. Then you can use js to get the content of these tags, then assemble it into the data to be submitted, and then submit it to the backend through ajax

Simple html form submission will definitely work, but if you use js to process it, you can put it anywhere, as long as you can use js to get the value. .

Form submission

How the browser submits the form, or in other words, what does the browser do when submitting the form.

The browser does not send all form controls to the server. Instead, it searches for all [success controls] and only sends the data of these successful controls to the server. What is a success control?
Simply put, the successful control is: each control in the form should have a name attribute and "current value". When submitted, they will be part of the submitted data in the form of name=value.
For some special cases, the success control also has the following provisions:

1. The control cannot be in the [disabled] state, that is, specify [disabled="disabled"]. That is: a disabled control will not be a successful control.

2. If a form contains multiple submit buttons, only the submit button clicked by the user is considered a successful control.

3. For checkbox controls, only those checked by the user are considered successful controls.

4. For radio buttons, only those checked by the user are considered successful controls.

5. For the select control, all selected options are used as success controls, and the name is provided by the select control.

6. For the file upload file control, if it contains the selected file, then it will be a successful control.

In addition, the browser will not consider the Reset button and OBJECT elements.

Note:

1. For checkbox and radio button, if they are confirmed as successful controls but no value attribute is specified for the control, then "on" will be used as their value when the form is submitted

2. If the value of a form control cannot be read on the server side, please check whether it meets the above rules.

So, formform submission can only recognize the above htmltypes, other types of formwill not be submitted to the server when submitted

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Referenced from Fish Li,