1. Project defaults to daytime and requires a set of night mode. Skinning includes element-ui+ custom style, and two sets have been prepared.
2. written in sass and put online, users can manually switch day and night themes;

thought of:

prepare light-color.scss,night-color.scss, to write two sets of colors in it, import each page of variable.scss, to introduce variable color number, generate two sets of css files, and then use js to switch the href of link to switch themes.

but there is a problem with the actual operation: how to package the project manually and get it to package two sets of css.

maybe there"s a better way?