javascript - 在字符串左侧添加空格
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javascript - adding white space to left of string
提问by K3NN3TH
Is there a better way to add x amount of white space to a string?
有没有更好的方法向字符串添加 x 个空格？
str = "blah";
x = 4;
for (var i = 0; i < x; i++){
str = ' ' + str;
}
return str;
回答by Declan Cook
Could do it like this, prevents the loop.
可以这样做，防止循环。
str = str + new Array(x + 1).join(' ')
str = str + new Array(x + 1).join(' ')
回答by slebetman
In ES6 you can do the following:
在 ES6 中，您可以执行以下操作：
str = ' '.repeat(x) + str;
At this point in time (late 2014) it's only available in Chrome and Firefox. But in two years it should be widely supported.
目前（2014 年末）它仅在 Chrome 和 Firefox 中可用。但在两年内应该得到广泛支持。
See the documentation for more info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat
有关更多信息，请参阅文档：https: //developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat
回答by Penny Liu
Alternatively using lodash _.padStart. Pads string on the left side if it's shorter than length.
或者使用 lodash _.padStart。如果字符串比长度短，则在左侧填充字符串。
const str = 'blah',
len = str.length,
space = 4;
console.log(_.padStart(str, len + space));
// => ' blah'<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.js"></script>Or pure JavaScript:
或纯JavaScript：
const str = 'blah',
len = str.length,
space = 4;
console.log(str.padStart(len + space, ' '));回答by Ezequiel García
for example you can use repeat for the white space left or right of your string:
例如，您可以对字符串左侧或右侧的空白使用重复：
var j = 6;
for (i = 0; i < n; i++) {
console.log(" ".repeat(j-1)+"#".repeat(i+1))
j--;
}
