我有多个获取城市的输入字段。我希望在用户输入城市名称时将每个单词的第一个字母 设置为自动大写,而其余字母则强制为小写< /强>
注意:由于我的要求,CSS text-transform
属性不起作用,因为它只修改单词的第一个字母 - - 如果用户键入超出第一个字母的大写字母信,不会调整它。
到目前为止,我有这个JavaScript:
function forceLower(strInput) {
strInput.value=strInput.value.toLowerCase();
}
成功将整个输入转换为小写。
答案 0 :(得分:5)
有关详细信息,请参阅内联评论:
// Get a reference to the input and wire it up to an input event handler that
// calls the fixer function
document.getElementById("txtTest").addEventListener("input", forceLower);
// Event handling functions are automatically passed a reference to the
// event that triggered them as the first argument (evt)
function forceLower(evt) {
// Get an array of all the words (in all lower case)
var words = evt.target.value.toLowerCase().split(/\s+/g);
// Loop through the array and replace the first letter with a cap
var newWords = words.map(function(element){
// As long as we're not dealing with an empty array element, return the first letter
// of the word, converted to upper case and add the rest of the letters from this word.
// Return the final word to a new array
return element !== "" ? element[0].toUpperCase() + element.substr(1, element.length) : "";
});
// Replace the original value with the updated array of capitalized words.
evt.target.value = newWords.join(" ");
}
&#13;
<input type="text" id="txtTest">
&#13;
答案 1 :(得分:3)
你可以使用css进行这个text-transform:capitalize
function firstCap(str){
var returnVar='';
var strSplit=str.split(' ');
for(var i=0;i<strSplit.length;i++){
returnVar=returnVar+strSplit[i].substring(0,1).toUpperCase()+strSplit[i].substring(1).toLowerCase() +' ';
}
return returnVar
}
div , input {text-transform: capitalize;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div> this is only the first lettter</div>
<input type="text"/>