Replace the line breaks contained in the strings in textarea with the javascript code _ form special effect of & lt; br & gt;

Replace the line breaks contained in the strings in textarea with the javascript code on the first floor of & amp; lt; br & amp; gt;
Textarea. value. replace (/\ n/g ,"
");
2nd floor
S = textarea. value. replace (/\ r \ n/g ,"
");

Third floor
Change immediately when pressed
V id = "a" contentEditable = "true" style = 'border: 1 solid black'>
In fact, many people have discussed this before. It is terrible to compare multiple code methods. If you don't need it, you don't have time to study it. Now I have tried it for you. In fact, it's easy to solve it :)

About the Microsoft HTML editing control, click Enter to insert

Instead
Solution

Edit controls without Script Processing

Script
Function a. onkeypress (){
If (event. keyCode = 13 ){
Var txtobj = document. selection. createRange ()
Txtobj. text = ""? Txtobj. text = "\ n" :( document. selection. clear () & (txtobj. text = "\ n") // composite expression to solve the cursor positioning problem of carriage return when selected text exists
Document. selection. createRange (). select ()
Return false
}}
Script
4th floor
Change immediately when pressed
V id = "a" contentEditable = "true" style = 'border: 1 solid black'>
In fact, many people have discussed this before. It is terrible to compare multiple code methods. If you don't need it, you don't have time to study it. Now I have tried it for you. In fact, it's easy to solve it :)

About the Microsoft HTML editing control, click Enter to insert

Instead
Solution

Edit controls without Script Processing

Script
Function a. onkeypress (){
If (event. keyCode = 13 ){
Var txtobj = document. selection. createRange ()
Txtobj. text = ""? Txtobj. text = "\ n" :( document. selection. clear () & (txtobj. text = "\ n") // composite expression to solve the cursor positioning problem of carriage return when selected text exists
Document. selection. createRange (). select ()
Return false
}}
Script
5th floor
Change immediately when pressed
V id = "a" contentEditable = "true" style = 'border: 1 solid black'>
In fact, many people have discussed this before. It is terrible to compare multiple code methods. If you don't need it, you don't have time to study it. Now I have tried it for you. In fact, it's easy to solve it :)

About the Microsoft HTML editing control, click Enter to insert

Instead
Solution

Edit controls without Script Processing

Script
Function a. onkeypress (){
If (event. keyCode = 13 ){
Var txtobj = document. selection. createRange ()
Txtobj. text = ""? Txtobj. text = "\ n" :( document. selection. clear () & (txtobj. text = "\ n") // composite expression to solve the cursor positioning problem of carriage return when selected text exists
Document. selection. createRange (). select ()
Return false
}}
Script