“This is the 27th day of my participation in the Gwen Challenge in November. See details of the event: The Last Gwen Challenge in 2021”
preface
The content of today’s lecture is TS thing, called the three slash instruction
///
The body of the
What is a triple slash instruction
As in ///
above, the format is three slashes followed by a label
You can think of it as a single-line comment, except that it is special and is parsed as a compiler instruction
You can also think of it as import, which tells the compiler about additional files to import during compilation
A position
The position of the three slash instruction is particular
It must be placed at the very top of the file, except that other comments may appear before a triple-slash directive, including single-line, multi-line, and triple-slash directives
Otherwise, the triple slash command will be treated as a normal one-line comment without any special meaning
Common three slash instruction
/// <reference path="..." />
Used to declare dependencies between files
/// <reference types="..." />
Used to declare a dependency on a package
/// <reference no-default-lib="true"/>
Used to mark a file as the default library
/// <amd-module />
Used to pass an optional module name to the compiler
/// <amd-dependency path="x"/>
Tells the compiler that a non-TS module dependency needs to be injected; However, this directive has been replaced with the import “x” statement
Pay attention to the point
A few additional points need to be added:
- The compiler preprocesses the input file to parse all the tri-slash reference instructions
- An error is reported when a file references a nonexistent file with the triple slash command
- If you specify
--noResolveThe compiler option, triple slash references are ignored, neither introducing new files nor changing the order of a given file
END
That’s all for this article. If you have any questions, please point out