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the :class directive can also co-exist with the plain class attribute. v-bind:class 可以和原生元素的 class attribute 共存. 他们会进行合并. array 中的元素, 如果不带'…

In-template expressions are very convenient, but they are meant for simple operations. template 里面的表达式是为了简单的操作而准备的. Putting too much logic …

3.Under the hood, Vue compiles the templates into Virtual DOM render functions. 4.figure out the minimal number of components to re-render …