How do I start a front-end project

[sumingyue]

hi:
Now I am trying to modify the front-end code, which requires NPM run build first, and then NPM run start, and the modified content will take effect。
This step took too long, and I don't think my command to start the front-end project was correct to cause it to take so long。
So，What is the right development mode to start a front-end project?

thands

[support]

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