Sublime Text 3 install lint to verify syntax
1."ctrl+shift+p" to choose package control :install package. type sublimelinter,choose first one to install.
If you want to use different computer languages,such as javascript.Then you have to install the pacific one.
2.install sublimelinter-jshint.
3.download node.js from https://nodejs.org/download/ ,then install to your computer.
4.open command window to type npm install -g jshint
5.reopen Sublime text 3 to verify.
the yellow frame is a syntax hint because of lacking a ";" to end .