function type(obj) {
return Object.prototype.toString.call(obj).replace(/\[object\s|\]/g, "");
}
function isArray(list) {
return type(list) === "Array";
}
function isObject(obj) {
return type(obj) === "Object";
}
function isString(str) {
return type(str) === "String";
}
function isNotEmptyObj(obj) {
return isObject(obj) && JSON.stringify(obj) != "{}";
}
function objForEach(obj, fn) {
isNotEmptyObj(obj) && Object.keys(obj).forEach(fn);
}
function aryForEach(ary, fn) {
ary.length && ary.forEach(fn);
}
function setAttr(node, key, value) {
switch (key) {
case "style":
node.style.cssText = value;
break;
case "value":
var tagName = node.tagName || "";
tagName = tagName.toLowerCase();
if (tagName === "input" || tagName === "textarea") {
node.value = value;
} else {
// if it is not a input or textarea, use `setAttribute` to set
node.setAttribute(key, value);
}
break;
default:
node.setAttribute(key, value);
break;
}
}
function toArray(data) {
if (!data) {
return [];
}
const ary = [];
aryForEach(data, item => {
ary.push(item);
});
return ary;
}
export {
isArray,
isObject,
isString,
isNotEmptyObj,
objForEach,
aryForEach,
setAttr,
toArray
};
详情见:https://segmentfault.com/a/1190000019994425
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