是否有一个简单的方法来转换字符串标题大小写?例如,约翰·史密斯变成了约翰·史密斯。我不是在寻找像John Resig的解决方案那样复杂的东西,只是(希望)一些一两行代码。
当前回答
一种稍微优雅一点的方式,改编了Greg Dean的功能:
String.prototype.toProperCase = function () {
return this.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
};
这样称呼它:
"pascal".toProperCase();
其他回答
function toTitleCase(str) {
var strnew = "";
var i = 0;
for (i = 0; i < str.length; i++) {
if (i == 0) {
strnew = strnew + str[i].toUpperCase();
} else if (i != 0 && str[i - 1] == " ") {
strnew = strnew + str[i].toUpperCase();
} else {
strnew = strnew + str[i];
}
}
alert(strnew);
}
toTitleCase("hello world how are u");
如果你想使用NPM库,请查看title-case:
安装:
npm install title-case --save
用法:
import { titleCase } from "title-case";
titleCase("string"); //=> "String"
titleCase("follow step-by-step instructions"); //=> "Follow Step-by-Step Instructions"
ES 6
str.split(' ')
.map(s => s.slice(0, 1).toUpperCase() + s.slice(1).toLowerCase())
.join(' ')
else
str.split(' ').map(function (s) {
return s.slice(0, 1).toUpperCase() + s.slice(1).toLowerCase();
}).join(' ')
下面是我的函数,它转换为标题大小写,但也保留了定义的首字母缩写为大写,小词为小写:
String.prototype.toTitleCase = function() {
var i, j, str, lowers, uppers;
str = this.replace(/([^\W_]+[^\s-]*) */g, function(txt) {
return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();
});
// Certain minor words should be left lowercase unless
// they are the first or last words in the string
lowers = ['A', 'An', 'The', 'And', 'But', 'Or', 'For', 'Nor', 'As', 'At',
'By', 'For', 'From', 'In', 'Into', 'Near', 'Of', 'On', 'Onto', 'To', 'With'];
for (i = 0, j = lowers.length; i < j; i++)
str = str.replace(new RegExp('\\s' + lowers[i] + '\\s', 'g'),
function(txt) {
return txt.toLowerCase();
});
// Certain words such as initialisms or acronyms should be left uppercase
uppers = ['Id', 'Tv'];
for (i = 0, j = uppers.length; i < j; i++)
str = str.replace(new RegExp('\\b' + uppers[i] + '\\b', 'g'),
uppers[i].toUpperCase());
return str;
}
例如:
"TO LOGIN TO THIS SITE and watch tv, please enter a valid id:".toTitleCase();
// Returns: "To Login to This Site and Watch TV, Please Enter a Valid ID:"
Var结果= “这很有趣”。/\b[a-z]/g, (x) => x. touppercase ()) console.log(result) // This Is Very Interesting