export default bindel binding vnode oldVnode 弹框可拉伸最小宽高 const minWidth = 400; const minHeight = 300; 初始非全屏 let isFullScreen = true; 当前宽高 let nowWidth = 0; let nowHight = 0;

This code is a custom directive for an element in a Vue.js application. It allows the user to drag and resize a dialog box by clicking and dragging on the header. The dialog box can also be double-clicked to toggle full-screen mode.

The code includes several variables to define the minimum width and height of the dialog box, as well as variables for tracking the current width, height, and margin top of the box. The code also gets the current styles for the dialog box and header element.

The moveDown function is called when the user clicks on the header element and starts to drag the dialog box. It calculates the current position of the box and moves it based on the user's mouse movements.

The ondblclick function is called when the user double-clicks on the header element. It toggles between full-screen mode and the original size of the box.

Overall, this code provides a useful and intuitive way for users to interact with a dialog box in a Vue.js application