HTML line feed code

when processing a customer's website today, it encountered a serious problem: HTML Code cannot be automatically wrapped. if the cause is unknown, it is useless for a long time ,, later, I checked the information to get the HTML code automatically wrapped. the article is as follows: press enter, it means that after a line break or followed by the last line, there is no it is a paragraph label, because for example, the labels such as center and indent are all in the unit of paragraph, therefore, it has more functions than , but each line feed will have an empty row, with In addition, for example, tables, forms, and horizontal lines are all forced line breaks, that is, no matter whether there are line breaks before the labels that follow. text