How to use the clearScreenDown function from readline

Find comprehensive JavaScript readline.clearScreenDown code examples handpicked from public code repositorys.

build.js

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// source: https://github.com/vuejs/vue-cli/blob/dev/packages/%40vue/cli-shared-utils/lib/logger.js
if (process.stdout.isTTY) {
  const blank = '\n'.repeat(process.stdout.rows);
  console.log(blank);
  readline.cursorTo(process.stdout, 0, 0);
  readline.clearScreenDown(process.stdout);
  if (msg) {
    console.log(msg);
  }
}

test-readline-csi.js

GitHub: vladimir-andreevich/node.js-14-windows-7

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assert.deepStrictEqual(writable.data, CSI.kClearScreenDown);
assert.strictEqual(readline.clearScreenDown(writable, common.mustCall()), true);


// Verify that clearScreenDown() throws on invalid callback.
assert.throws(() => {
  readline.clearScreenDown(writable, null);
}, /ERR_INVALID_CALLBACK/);


// Verify that clearScreenDown() does not throw on null or undefined stream.
assert.strictEqual(readline.clearScreenDown(null, common.mustCall((err) => {

+ 5 other calls in file

listview.js

GitHub: akirco/nc

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let currentKeyIndex = 0;
let currentDependencyIndex = 0;

// const printDependencies = () => {
//   readline.moveCursor(process.stdout, 0, -1000); // 将光标移动到屏幕最上方
//   readline.clearScreenDown(process.stdout); // 清除屏幕
//   const key = keys[currentKeyIndex];
//   process.stdout.write(key.toUpperCase() + ":\n");
//   const depKeys = Object.keys(dependencies[key]);
//   depKeys.forEach((depKey, index) => {

+ 3 other calls in file

constructor.js

GitHub: vladimir-andreevich/node.js-14-windows-7

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  if (this._stdout.isTTY && process.env.TERM !== 'dumb') {
    // The require is here intentionally to avoid readline being
    // required too early when console is first loaded.
    const { cursorTo, clearScreenDown } = require('readline');
    cursorTo(this._stdout, 0, 0);
    clearScreenDown(this._stdout);
  }
},

// Defined by: https://console.spec.whatwg.org/#count

output.js

GitHub: NJUyd2001/2023_NJUspringE-

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  if (!this.capturing && this.enabled && process.stdout.isTTY) {
    // Fill screen with blank lines. Then move to 0 (beginning of visible part) and clear it
    const blank = '\n'.repeat(process.stdout.rows)
    console.log(blank)
    readline.cursorTo(process.stdout, 0, 0)
    readline.clearScreenDown(process.stdout)
  }
}

captureLogs (fun) {