去除字符串中所有空格
function trim(str) {
return str.replace(/\s*/g, '');
}
console.log('=' + trim(' Hello World ! ') + '='); // =HelloWorld!=
去除字符串两边的空格
function trimBothSides(str) {
return str.replace(/^\s*|\s*$/g, '');
}
console.log('=' + trimBothSides(' Hello World! ') + '='); // =Hello World!=
console.log('=' + ' Hello World ! '.trim() + '='); // =Hello World !=
去除字符串左边的空格
function trimLeft(str) {
return str.replace(/^\s*/, '');
}
console.log('=' + trimLeft(' Hello World! ') + '='); // =Hello World! =
console.log('=' + ' Hello World ! '.trimLeft() + '='); // =Hello World ! =
去除字符串右边的空格
function trimRight(str) {
return str.replace(/\s*$/, '');
}
console.log('=' + trimRight(' Hello World! ') + '='); // = Hello World!=
console.log('=' + ' Hello World ! '.trimRight() + '='); // = Hello World !=