How to compile multiple Typescript files into a single file ?
Last Updated :
09 Mar, 2022
In this article, we will learn how to compile multiple Typescript files into a single file. There are two approaches that can be followed here:
Approach 1: Compiling multiple Typescript files into a single JavaScript file. We simply use the following syntax:
Syntax:
tsc –out outputFile.js typeScriptFile1.ts typeScriptFile2.ts … typeScriptFilen.ts
Explanation:
- tsc: It stands for TypeScript compiler which is used to invoke the compiler in order to compile the TypeScript files.
- –out: It is a CLI (Command Line Interface) command which concatenates the TypeScript files and emits the output to a single JS file.
- outputFile.js: The JavaScript file which holds the result of the compilation of the TypeScript files.
- typeScriptFile1, typeScriptFile2 … typeScriptFilen: The TypeScript files to be compiled.
Example: Here, three TypeScript files with the names script.ts, index.ts and app.ts are compiled to a single JavaScript file output.js. Subsequently, the JavaScript file is executed by using the following CLI command:
node output.js
script.ts
const myArr = [1, 2, 3, 4, 5];
console.log("CONTENTS OF FILE 1");
for (let i = 0; i < myArr.length; i++) {
console.log(myArr[i]);
}
|
index.ts
const GFG = ["Geeks", "For", "Geeks"];
console.log("\nCONTENTS OF FILE 2");
for (let i = 0; i < GFG.length; i++) {
console.log(GFG[i]);
}
|
app.ts
const geeks = [true, false, 2.5, 5];
console.log("\nCONTENTS OF FILE 3");
for (let i = 0; i < geeks.length; i++) {
console.log(geeks[i]);
}
|
Generated output JavaScript file “output.js”
output.js
var myArr = [1, 2, 3, 4, 5];
console.log("CONTENTS OF FILE 1");
for (var i = 0; i < myArr.length; i++) {
console.log(myArr[i]);
}
var GFG = ["Geeks", "For", "Geeks"];
console.log("\nCONTENTS OF FILE 2");
for (var i = 0; i < GFG.length; i++) {
console.log(GFG[i]);
}
var geeks = [true, false, 2.5, 5];
console.log("\nCONTENTS OF FILE 3");
for (var i = 0; i < geeks.length; i++) {
console.log(geeks[i]);
}
|
Output:
Approach 2: Compiling multiple Typescript files into a single TypeScript file. We use the following syntax:
Syntax:
tsc –out outputFile.ts typeScriptFile1.ts typeScriptFile2.ts … typeScriptFilen.ts
Explanation:
- tsc: It stands for TypeScript compiler which is used to invoke the compiler in order to compile the TypeScript files.
- –out: It is a CLI (Command Line Interface) command which concatenates the TypeScript files and emits the output to a single TypeScript file
- outputFile.ts: The TypeScript file which holds the result of the compilation of the TypeScript files
- typeScriptFile1, typeScriptFile2 … typeScriptFilen: The TypeScript files to be compiled.
Example: Here, three TypeScript files with the names file1.ts, file2.ts and file3.ts are compiled to a single TypeScript file output.ts. After that, the resultant TypeScript file is compiled to a JavaScript file output.js and then the JavaScript file is executed by using the following CLI commands:
tsc output.ts
node output.js
file1.ts
let i = 1;
console.log("CONTENTS OF FILE 1");
while (i <= 5) {
console.log(i);
i++;
}
|
file2.ts
console.log("\nCONTENTS OF FILE 2");
console.log("GeeksForGeeks is a computer science portal for geeks.");
|
file3.ts
const geeks = [2, 4, 6, 8];
console.log("\nCONTENTS OF FILE 3");
for (let i = 0; i < geeks.length; i++) {
console.log(geeks[i]);
}
|
Generated output TypeScript file “output.ts”
output.ts
var i = 1;
console.log("CONTENTS OF FILE 1");
while (i <= 5) {
console.log(i);
i++;
}
console.log("\nCONTENTS OF FILE 2");
console.log("GeeksForGeeks is a computer science portal for geeks.");
var geeks = [2, 4, 6, 8];
console.log("\nCONTENTS OF FILE 3");
for (var i_1 = 0; i_1 < geeks.length; i_1++) {
console.log(geeks[i_1]);
}
|
Generated output JavaScript file “output.js”
output.js
var i = 1;
console.log("CONTENTS OF FILE 1");
while (i <= 5) {
console.log(i);
i++;
}
console.log("\nCONTENTS OF FILE 2");
console.log("GeeksForGeeks is a computer science portal for geeks.");
var geeks = [2, 4, 6, 8];
console.log("\nCONTENTS OF FILE 3");
for (var i_1 = 0; i_1 < geeks.length; i_1++) {
console.log(geeks[i_1]);
}
|
Output:
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