FakeRainBrigandFrodik提出了一个问题：How to replace selected text with html in a contenteditable element? [duplicate]，或许与您遇到的问题类似。
回答者CommunityJordan Arron给出了该问题的处理方式：
See here for working jsFiddle: http://jsfiddle.net/dKaJ3/2/
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Code taken from Tim Down: Return HTML from a user-selected text
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来源：JavaScript中文网 ，转载请注明来源 https://www.javascriptcn.com/post/15696