now you need to pass a image object to the drawImage (img,dx,dy) method of canvas for drawing. but the picture it draws by default has a transparent area around it and is filled with white by default. is the image source as follows: : in t...
what is the use of the id attribute set in the HTML tag, and why can I access the element directly with the id value? < hr > as follows: I set id= "text " on a textarea I can directly use text as a variable, the same as document.getEle...
in react, if the third-party components are encapsulated, then {a, b, .props} = this.props; < Button {.props} > an and b are custom attributes, and the remaining attributes are passed directly to the third-party components. How to achieve this functi...
I m building a multi-page scaffolding, the kind of webpack4 that traditional jquery uses to write static pages. here s how I deal with page styles: all pages share a style.less (the project is small, I don t want a css file per page), and then the ...
what does it mean to show more than one? shouldn t there be only one HEAD? ...
there is a lot of information about iView on the Internet, but I just can t find out who opened it in the first place. So, excuse me, which company or team is open source iView? ...