The toUpperCase() method does not change the value of the originalstring. Example Let's take a look at an example of how to use the toUpperCase() method in JavaScript. For example: vartotn_string='TechOnTheNet';console.log(totn_string.toUpperCase()); In this example, we have declared a...
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您可以使用.propertyName符号或["propertyName"]符号访问任何对象的成员.这是JavaScript语言的特性.要确保该成员在对象中,只需检查它是否已定义: functioncallMethod(method){returnfunction(obj){if(typeof(obj[method]) =='function')//in that case, check if it is a functionreturnobj[method]();//and the...
The toLowerCase() Method The toLocaleLowerCase() Method The toLocaleUpperCase() Method Syntax string.toUpperCase() Parameters NONE Return Value TypeDescription A stringThe string converted to uppercase. Related Pages JavaScript Strings JavaScript String Methods ...
ES6 String toUpperCase Method - Learn how to use the toUpperCase method in JavaScript ES6 to convert strings to uppercase. Simple examples and explanations included.
JavaScript 是如何工作的：模块的构建以及对应的打包工具在JavaScript中，函数表达式是一种将函数赋值给变量...
The toUpperCase() method is used to convert a string to uppercase.VersionImplemented in JavaScript 1.0 SyntaxtoUpperCase() ParameterNoneExample:In the following web document toUpperCase() method converts a given string to uppercase.<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" ...
Learn how to convert a string to uppercase in JavaScript using the toUpperCase method. Understand its usage with examples and best practices.
In contexts where a method is to be invoked on a primitive string or a property lookup occurs, JavaScript will automatically wrap the string primitive and call the method or perform the property lookup. 您可以通过记录String.prototype.toUpperCase来查看函数是否存在。 所以在javascript中,objects是object...
console.log(upperMessage); // Output: JAVASCRIPT IS FUN Run Code toUpperCase() Syntax The syntax of the toUpperCase() method is: str.toUpperCase() Here, str is a string. toUpperCase() Parameters The toUpperCase() method does not take in any parameters. toUpperCase() Return Value Returns a...