process.emitWarning(warning[, options])
添加於:v8.0.0
參數
warning
<string> | <Error> 要發出的警告。options
<Object>type
<string>什麽時候warning
是一個String
,type
是用於類型發出警告。默認:'Warning'
.code
<string> 發出的警告實例的唯一標識符。ctor
<Function> 當warning
是String
時,ctor
是一個可選函數,用於限製生成的堆棧跟蹤。 默認:process.emitWarning
。detail
<string> 要包含在錯誤中的附加文本。
process.emitWarning()
方法可用於發出自定義或應用程序特定的進程警告。可以通過向
事件添加處理程序來監聽這些。'warning'
import { emitWarning } from 'node:process'; // Emit a warning with a code and additional detail. emitWarning('Something happened!', { code: 'MY_WARNING', detail: 'This is some additional information' }); // Emits: // (node:56338) [MY_WARNING] Warning: Something happened! // This is some additional information
const { emitWarning } = require('node:process'); // Emit a warning with a code and additional detail. emitWarning('Something happened!', { code: 'MY_WARNING', detail: 'This is some additional information' }); // Emits: // (node:56338) [MY_WARNING] Warning: Something happened! // This is some additional information
在此示例中,Error
對象由 process.emitWarning()
在內部生成並傳遞給
處理程序。'warning'
import process from 'node:process'; process.on('warning', (warning) => { console.warn(warning.name); // 'Warning' console.warn(warning.message); // 'Something happened!' console.warn(warning.code); // 'MY_WARNING' console.warn(warning.stack); // Stack trace console.warn(warning.detail); // 'This is some additional information' });
const process = require('node:process'); process.on('warning', (warning) => { console.warn(warning.name); // 'Warning' console.warn(warning.message); // 'Something happened!' console.warn(warning.code); // 'MY_WARNING' console.warn(warning.stack); // Stack trace console.warn(warning.detail); // 'This is some additional information' });
如果 warning
作為 Error
對象傳遞,則忽略 options
參數。
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注:本文由純淨天空篩選整理自nodejs.org大神的英文原創作品 process.emitWarning(warning[, options])。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。