清除 NodeJS 流中的所有行 [英] Clear all lines in NodeJS stream

问题描述

process.stdout.clearLine() 删除最新行.如何删除 stdout 中的所有行?

process.stdout.clearLine() deletes latest line. How can I delete all lines from stdout?

var out = process.stdout;
out.write("1\n"); // prints `1` and new line
out.write("2");   // prints `2`

setTimeout(function () {
    process.stdout.clearLine(); // clears the latest line (`2`)
    out.cursorTo(0);            // moves the cursor at the beginning of line
    out.write("3");             // prints `3`
    out.write("\n4");           // prints new line and `4`
    console.log();
}, 1000);

输出为:

1
3
4

我想从 stdout 中删除所有行而不是最新行，所以输出将是:

I want to delete all lines from stdout instead of latest line, so the output will be:

3
4

推荐答案

不知道这是否有助于您尝试此代码:

dont know if this helps you try this code:

var out = process.stdout;
var numOfLinesToClear = 0;
out.write("1\n");   // prints `1` and new line
++numOfLinesToClear;
out.write("2\n");
++numOfLinesToClear;
process.stdout.moveCursor(0,-numOfLinesToClear); //move the cursor to first line
setTimeout(function () {   
    process.stdout.clearLine();
    out.cursorTo(0);            // moves the cursor at the beginning of line
    out.write("3");             // prints `3`
    out.write("\n4");           // prints new line and `4`
    console.log();
}, 1000);

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