import vs require

Author: Hussein Nasser

06-check/061-setImmediatevstimer.js

@@ -6,6 +6,7 @@
 setTimeout(() => {
     console.log('timeout');
   }, 0);
-  setImmediate(() => {
+
+setImmediate(() => {
     console.log('immediate');
   });

08-nextTick/083-nextTickInit.js

@@ -6,7 +6,7 @@ function test () {
 //the output is undefined
 //if we call it through nextTick
 //the output is 1
-//process.nextTick( test)
+process.nextTick( test)
 //test()
 //setTimeout( test, 0)
 val = 1;

09-importvsrequire/090-require.js

@@ -1,22 +1,25 @@
+//.js supports both require and import
+//.mjs only supports import
+
 console.log("Start Initial phase")
 //tip, require relative path works based on where the current execution is 
 console.log("file is  " + __filename)
-require ("./098-moduleC.js")
+require ("./a.js")
 const f = 100;
 if (f == 110)
 {
     //this won't execute unless
     //condition is met 
-   console.log("Before requiring module A")
-   require ("./099-moduleA.js")
-   console.log("After requiring module A")
+   console.log("Before requiring module  B")
+   require ("./b.js")
+   console.log("After requiring module B")
 }
 
 const fs = require('fs');
 
 fs.readFile(__filename, () => {
   console.log("Before requiring module D")
-  require ("./096-moduleD.js")
+  require ("./d.mjs")
   console.log("After requiring module D")
 
 });

09-importvsrequire/091-import.js

@@ -1,20 +1,28 @@
 console.log("Start Initial phase")
-const fs = require('fs');
-import ("./099-moduleA.js")
+
+import ("./a.js")
 function loadModule() {
     console.log("before importing module B")
-    import ("./097-moduleB.mjs")
+    const x = import ("./b.mjs")
+    console.log(x)
     console.log("after importing module B")
 }
+ 
+
 console.log("Before calling B")
 loadModule();
 console.log("After calling B")
 
 setTimeout( ()=>console.log("timer"),0)
 
-fs.readFile(__filename, () => {
-  console.log("read file done")
-  setImmediate(() => console.log('immediate'));
-});
+const fs = import ('fs');
+
+fs.then (fs => {
+  fs.readFile("a.mjs", () => {
+    console.log("read file done")
+    setImmediate(() => console.log('immediate'));
+  });
+})
+
 console.log("End initial phase ")
 

09-importvsrequire/092-async-await-import.js

@@ -1,9 +1,9 @@
 console.log("Start Initial phase")
 const fs = require('fs');
-import ("./099-moduleA.js")
+import ("./a.js")
 async function loadModule() {
     console.log("before importing module B")
-    await import ("./097-moduleB.mjs")
+    await import ("./b.mjs")
     console.log("after importing module B") //this will be executed last
 }
 console.log("Before calling B")

09-importvsrequire/093-various-import.mjs

@@ -0,0 +1,27 @@
+console.log("start")
+//returns a promise
+if (1==2) {
+const a = import ("./a.js")
+console.log(a)
+}
+
+setTimeout( ()=> console.log("timer"),0);
+//resolves the promise and get x (returns a module)
+const b = await import ("./b.mjs")//true intial phase..
+console.log(JSON.stringify(b))
+//resolves the promise ( like await)
+//but returns the value
+import c from "./c.mjs"
+console.log(JSON.stringify(c))
+process.nextTick(()=>console.log("Initial phase end."))
+
+/*
+if (1=2 ) {
+
+
+
+import  xx from "./c.mjs"
+console.log(xx)
+}*/
+
+console.log("end")

09-importvsrequire/096-moduleD.js

@@ -0,0 +1,6 @@
+console.log("--Begin module a")
+for (let i= 0; i < 100000000; i ++);
+console.log("--End Module a")
+
+const test = {"test":"testa"} 
+export default test;

09-importvsrequire/097-moduleB.mjs

@@ -0,0 +1,6 @@
+console.log("--Begin module b")
+for (let i= 0; i < 100000000; i ++);
+console.log("--End Module b")
+
+const test = {"test":"testb"} 
+export default test;

09-importvsrequire/098-moduleC.js

@@ -0,0 +1,6 @@
+console.log("--Begin module c")
+for (let i= 0; i < 100000000; i ++);
+console.log("--End Module c")
+
+const test = {"test":"testc"} 
+export default test;

09-importvsrequire/099-moduleA.js

@@ -0,0 +1,6 @@
+console.log("--Begin module d")
+for (let i= 0; i < 100000000; i ++);
+console.log("--End Module d")
+
+const test = {"test":"testd"} 
+export default test;

09-importvsrequire/a.js

@@ -1,19 +1,24 @@
+
+
 console.log("Start Initial phase")
 function promiseWork () {
+    console.log("before new promise")
     return new Promise( (resolve, reject) =>  {
-        setTimeout(() => {
+        console.log("before new promise")
+       // setTimeout(() => {
             //done work
             console.log("--Processing...");
             const output = "done!"
             //resolve
             resolve(output)
-        }, 4000)
+        //}, 4000)
     } )
 }
 console.log("Before running")
 const x = promiseWork();
+console.log(x)
 console.log("After running")
 
-x.then(a => console.log("resolved " + a))
+x.then(a => console.log("resolved " + a)).catch(a=>console.err)
 console.log("End Initial phase")
 setTimeout(  () => console.log("timer"), 0);