What does input type mean and commonly used methods to limit input_HTML/Xhtml_Web page production

Commonly used methods to limit input
1. Cancel the dotted frame when the button is pressed, and add the attribute value hideFocus or HideFocus=true to the input

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2. Read only the content of the text box, add the attribute value readonly in the input

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3. Prevent TEXT documents that are cleared after going back (the style content can be used as a class reference)

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4. The ENTER key can move the cursor to the next input box

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5. Only for Chinese (with flashing)

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6. Can only be numbers (with flashing)

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7. Only numbers (no flashing)

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8. Only English and numbers can be entered (with flashing)

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9. Shield input method

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10. Only numbers, decimal points, minus signs (-) characters can be entered (no flashing)

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11. Only two decimal places and three decimal places can be entered (with flashing)

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