Vue.js is a popular front-end framework that allows you to build user interfaces in a declarative manner. Here are some common syntax rules for Vue.js:
1. Interpolation: Use double curly brackets "{ { }}" to insert the value of a variable or expression in the HTML template. For example: { { message }}.
2. Instructions: Vue.js provides some special instructions, starting with v-, for manipulating DOM elements. For example: v-if, v-for, v-bind, etc.
3. Event handling: Use the v-on directive to bind DOM events, such as click events. For example: v-on:click="handleClick" or abbreviated as @click="handleClick".
4. Computed attributes: Use the computed attribute to define a computed attribute, which is calculated based on the value of one or more responsive data and returns a result.
5. Monitoring attributes: Use the watch attribute to monitor changes in data and execute corresponding logic when changes occur.
6. Conditional rendering: Use v-if and v-else to render different content based on conditions. You can also use v-show to show or hide elements based on conditions.
7. List rendering: Use the v-for instruction to traverse the array or object and generate a list.
8. Style binding: You can use the v-bind:class and v-bind:style directives to bind CSS classes and inline styles.
9. Components: Vue.js allows you to create reusable components to encapsulate and organize your code.
This is just a small set of Vue.js syntax rules, but these are the basic rules that are commonly used. For more detailed syntax, you can refer to the official documentation of Vue.js.