Javascript javascript包括（）不区分大小写
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javascript includes() case insensitive
提问by LegendDemonSlayer
lets say I have an array of filter strings that I need to loop and check against with other passed in string.
假设我有一个过滤字符串数组，我需要循环并检查其他传入的字符串。
var filterstrings = ['firststring','secondstring','thridstring'];
var passedinstring = localStorage.getItem("passedinstring");
for (i = 0; i < filterstrings.lines.length; i++) {
if (passedinstring.includes(filterstrings[i])) {
alert("string detected");
}
}
How do I ensure that case sensitivity is ignored here (preferably by using regex) when filtering, if the var passedinstringwere to have strings like FirsTsTriNgor fiRSTStrING?
我如何确保在过滤时忽略区分大小写（最好使用正则表达式），如果var passedinstring它们有像FirsTsTriNg或这样的字符串fiRSTStrING？
回答by gurvinder372
You can create a RegExpfrom filterstringsfirst
您可以创建一个正则表达式从filterstrings第一
var filterstrings = ['firststring','secondstring','thridstring'];
var regex = new RegExp( filterstrings.join( "|" ), "i");
then testif the passedinstringis there
那么test如果在passedinstring那里
var isAvailable = regex.test( passedinstring );
回答by Nabin Paudyal
You can simply convert the passedinstring to lowercase.
您可以简单地将传入的字符串转换为小写。
var passedinstring = localStorage.getItem("passedinstring").toLowerCase();
回答by Saurabh Mistry
convert filterstring and passedinstring to lowercase and compare
将 filterstring 和 passinstring 转换为小写并进行比较
var filterstrings = ['firststring','secondstring','thridstring'];
var passedinstring =
localStorage.getItem("passedinstring").toLowerCase();
for (i = 0; i < filterstrings.lines.length; i++) {
if (passedinstring.includes(filterstrings[i].toLowerCase())) {
alert("string detected");
}
}
