很多网站使用了Pjax无刷新加载 顶部没有页面加载进度，为了美观丶流畅感觉可以加进去，分享写个教程给大家
首先创建一个js文件引入（把以下js代码放进去）
注意：引入到jquery.js的下面
!(function (n, e) {
"function" == typeof define && define.amd
? define(e)
: "object" == typeof exports
? (module.exports = e())
: (n.NProgress = e());
})(this, function () {
function n(n, e, t) {
return e > n ? e : n > t ? t : n;
}
function e(n) {
return 100 * (-1 + n);
}
function t(n, t, r) {
var i;
return (
(i =
"translate3d" === c.positionUsing
? { transform: "translate3d(" + e(n) + "%,0,0)" }
: "translate" === c.positionUsing
? { transform: "translate(" + e(n) + "%,0)" }
: { "margin-left": e(n) + "%" }),
(i.transition = "all " + t + "ms " + r),
i
);
}
function r(n, e) {
var t = "string" == typeof n ? n : o(n);
return t.indexOf(" " + e + " ") >= 0;
}
function i(n, e) {
var t = o(n),
i = t + e;
r(t, e) || (n.className = i.substring(1));
}
function s(n, e) {
var t,
i = o(n);
r(n, e) &&
((t = i.replace(" " + e + " ", " ")),
(n.className = t.substring(1, t.length - 1)));
}
function o(n) {
return (" " + (n.className || "") + " ").replace(/\s+/gi, " ");
}
function a(n) {
n && n.parentNode && n.parentNode.removeChild(n);
}
var u = {};
u.version = "0.2.0";
var c = (u.settings = {
minimum: 0.08,
easing: "ease",
positionUsing: "",
speed: 200,
trickle: !0,
trickleRate: 0.02,
trickleSpeed: 800,
showSpinner: !0,
barSelector: '[role="bar"]',
parent: "body",
template:
'<div class="bar" role="bar"><div class="peg"></div></div></div>'
});
(u.configure = function (n) {
var e, t;
for (e in n) (t = n[e]), void 0 !== t && n.hasOwnProperty(e) && (c[e] = t);
return this;
}),
(u.status = null),
(u.set = function (e) {
var r = u.isStarted();
(e = n(e, c.minimum, 1)), (u.status = 1 === e ? null : e);
var i = u.render(!r),
s = i.querySelector(c.barSelector),
o = c.speed,
a = c.easing;
return (
i.offsetWidth,
l(function (n) {
"" === c.positionUsing && (c.positionUsing = u.getPositioningCSS()),
f(s, t(e, o, a)),
1 === e
? (f(i, { transition: "none", opacity: 1 }),
i.offsetWidth,
setTimeout(function () {
f(i, { transition: "all " + o + "ms linear", opacity: 0 }),
setTimeout(function () {
u.remove(), n();
}, o);
}, o))
: setTimeout(n, o);
}),
this
);
}),
(u.isStarted = function () {
return "number" == typeof u.status;
}),
(u.start = function () {
u.status || u.set(0);
var n = function () {
setTimeout(function () {
u.status && (u.trickle(), n());
}, c.trickleSpeed);
};
return c.trickle && n(), this;
}),
(u.done = function (n) {
return n || u.status ? u.inc(0.3 + 0.5 * Math.random()).set(1) : this;
}),
(u.inc = function (e) {
var t = u.status;
return t
? ("number" != typeof e &&
(e = (1 - t) * n(Math.random() * t, 0.1, 0.95)),
(t = n(t + e, 0, 0.994)),
u.set(t))
: u.start();
}),
(u.trickle = function () {
return u.inc(Math.random() * c.trickleRate);
}),
(function () {
var n = 0,
e = 0;
u.promise = function (t) {
return t && "resolved" !== t.state()
? (0 === e && u.start(),
n++,
e++,
t.always(function () {
e--, 0 === e ? ((n = 0), u.done()) : u.set((n - e) / n);
}),
this)
: this;
};
})(),
(u.render = function (n) {
if (u.isRendered()) return document.getElementById("nprogress");
i(document.documentElement, "Progress-bar");
var t = document.createElement("div");
(t.id = "nprogress"), (t.innerHTML = c.template);
var r,
s = t.querySelector(c.barSelector),
o = n ? "-100" : e(u.status || 0),
l = document.querySelector(c.parent);
return (
f(s, {
transition: "all 0 linear",
transform: "translate3d(" + o + "%,0,0)"
}),
c.showSpinner || ((r = t.querySelector(c.spinnerSelector)), r && a(r)),
l != document.body && i(l, "nprogress-custom-parent"),
l.appendChild(t),
t
);
}),
(u.remove = function () {
s(document.documentElement, "Progress-bar"),
s(document.querySelector(c.parent), "nprogress-custom-parent");
var n = document.getElementById("nprogress");
n && a(n);
}),
(u.isRendered = function () {
return !!document.getElementById("nprogress");
}),
(u.getPositioningCSS = function () {
var n = document.body.style,
e =
"WebkitTransform" in n
? "Webkit"
: "MozTransform" in n
? "Moz"
: "msTransform" in n
? "ms"
: "OTransform" in n
? "O"
: "";
return e + "Perspective" in n
? "translate3d"
: e + "Transform" in n
? "translate"
: "margin";
});
var l = (function () {
function n() {
var t = e.shift();
t && t(n);
}
var e = [];
return function (t) {
e.push(t), 1 == e.length && n();
};
})(),
f = (function () {
function n(n) {
return n
.replace(/^-ms-/, "ms-")
.replace(/-([\da-z])/gi, function (n, e) {
return e.toUpperCase();
});
}
function e(n) {
var e = document.body.style;
if (n in e) return n;
for (
var t, r = i.length, s = n.charAt(0).toUpperCase() + n.slice(1);
r--;
)
if (((t = i[r] + s), t in e)) return t;
return n;
}
function t(t) {
return (t = n(t)), s[t] || (s[t] = e(t));
}
function r(n, e, r) {
(e = t(e)), (n.style[e] = r);
}
var i = ["Webkit", "O", "Moz", "ms"],
s = {};
return function (n, e) {
var t,
i,
s = arguments;
if (2 == s.length)
for (t in e)
(i = e[t]), void 0 !== i && e.hasOwnProperty(t) && r(n, t, i);
else r(n, s[1], s[2]);
};
})();
return u;
});
再创建一个css文件 引入（把以下css代码放进去）
#nprogress{pointer-events:none}
#nprogress .bar{background:#73aaff;position:fixed;z-index:99999;top:0;left:0;width:100%;height:2px;}
#nprogress .peg{display:block;position:absolute;right:0;width:100px;height:100%;opacity:1;transform:rotate(3deg) translate(0,-4px);}最后加入pjax 重载函数
$(document).on('pjax:send', function() {
NProgress.start()
});
$(document).on("pjax:complete", function () {
NProgress.done();
});
