如何运行2个js函数

Question

我正在尝试运行2个功能，一个接一个。由于某种原因，它们都同时运行，但是第二个不能正确加载。有没有办法先运行第一个函数然后再运行第二个函数？：

//run this first
$('#abc').click(function() {
     $('.test1').show();
     return false;
  });  


//run this second
(function ($) {
    "use strict";
    // A nice closure for our definitions
    function getjQueryObject(string) {
        // Make string a vaild jQuery thing
        var jqObj = $("");
        try {
            jqObj = $(string)
                .clone();
        } catch (e) {
            jqObj = $("<span />")
                .html(string);
        }
        return jqObj;
    }

    function printFrame(frameWindow, content, options) {
        // Print the selected window/iframe
        var def = $.Deferred();
        try {
            frameWindow = frameWindow.contentWindow || frameWindow.contentDocument || frameWindow;
            var wdoc = frameWindow.document || frameWindow.contentDocument || frameWindow;
            if(options.doctype) {
                wdoc.write(options.doctype);
            }
            wdoc.write(content);
            wdoc.close();
            var printed = false;
            var callPrint = function () {
                if(printed) {
                    return;
                }
                // Fix for IE : Allow it to render the iframe
                frameWindow.focus();
                try {
                    // Fix for IE11 - printng the whole page instead of the iframe content
                    if (!frameWindow.document.execCommand('print', false, null)) {
                        // document.execCommand returns false if it failed -http://stackoverflow.com/a/21336448/937891
                        frameWindow.print();
                    }
                    // focus body as it is losing focus in iPad and content not getting printed
                    $('body').focus();
                } catch (e) {
                    frameWindow.print();
                }
                frameWindow.close();
                printed = true;
                def.resolve();
            }
            // Print once the frame window loads - seems to work for the new-window option but unreliable for the iframe
            $(frameWindow).on("load", callPrint);
            // Fallback to printing directly if the frame doesn't fire the load event for whatever reason
            setTimeout(callPrint, options.timeout);
        } catch (err) {
            def.reject(err);
        }
        return def;
    }

    function printContentInIFrame(content, options) {
        var $iframe = $(options.iframe + "");
        var iframeCount = $iframe.length;
        if (iframeCount === 0) {
            // Create a new iFrame if none is given
            $iframe = $('<iframe height="0" width="0" border="0" wmode="Opaque"/>')
                .prependTo('body')
                .css({
                    "position": "absolute",
                    "top": -999,
                    "left": -999
                });
        }
        var frameWindow = $iframe.get(0);
        return printFrame(frameWindow, content, options)
            .done(function () {
                // Success
                setTimeout(function () {
                    // Wait for IE
                    if (iframeCount === 0) {
                        // Destroy the iframe if created here
                        $iframe.remove();
                    }
                }, 1000);
            })
            .fail(function (err) {
                // Use the pop-up method if iframe fails for some reason
                console.error("Failed to print from iframe", err);
                printContentInNewWindow(content, options);
            })
            .always(function () {
                try {
                    options.deferred.resolve();
                } catch (err) {
                    console.warn('Error notifying deferred', err);
                }
            });
    }

    function printContentInNewWindow(content, options) {
        // Open a new window and print selected content
        var frameWindow = window.open();
        return printFrame(frameWindow, content, options)
            .always(function () {
                try {
                    options.deferred.resolve();
                } catch (err) {
                    console.warn('Error notifying deferred', err);
                }
            });
    }

    function isNode(o) {
        /* http://stackoverflow.com/a/384380/937891 */
        return !!(typeof Node === "object" ? o instanceof Node : o && typeof o === "object" && typeof o.nodeType === "number" && typeof o.nodeName === "string");
    }
    $.print = $.fn.print = function () {
        // Print a given set of elements
        var options, $this, self = this;
        // console.log("Printing", this, arguments);
        if (self instanceof $) {
            // Get the node if it is a jQuery object
            self = self.get(0);
        }
        if (isNode(self)) {
            // If `this` is a HTML element, i.e. for
            // $(selector).print()
            $this = $(self);
            if (arguments.length > 0) {
                options = arguments[0];
            }
        } else {
            if (arguments.length > 0) {
                // $.print(selector,options)
                $this = $(arguments[0]);
                if (isNode($this[0])) {
                    if (arguments.length > 1) {
                        options = arguments[1];
                    }
                } else {
                    // $.print(options)
                    options = arguments[0];
                    $this = $("html");
                }
            } else {
                // $.print()
                $this = $("html");
            }
        }
        // Default options
        var defaults = {
            globalStyles: true,
            mediaPrint: false,
            stylesheet: null,
            noPrintSelector: ".no-print",
            iframe: true,
            append: null,
            prepend: null,
            manuallyCopyFormValues: true,
            deferred: $.Deferred(),
            timeout: 750,
            title: null,
            doctype: '<!doctype html>'
        };
        // Merge with user-options
        options = $.extend({}, defaults, (options || {}));
        var $styles = $("");
        if (options.globalStyles) {
            // Apply the stlyes from the current sheet to the printed page
            $styles = $("style, link, meta, base, title");
        } else if (options.mediaPrint) {
            // Apply the media-print stylesheet
            $styles = $("link[media=print]");
        }
        if (options.stylesheet) {
            // Add a custom stylesheet if given
            $styles = $.merge($styles, $('<link rel="stylesheet" href="' + options.stylesheet + '">'));
        }
        // Create a copy of the element to print
        var copy = $this.clone();
        // Wrap it in a span to get the HTML markup string
        copy = $("<span/>")
            .append(copy);
        // Remove unwanted elements
        copy.find(options.noPrintSelector)
            .remove();
        // Add in the styles
        copy.append($styles.clone());
        // Update title
        if (options.title) {
            var title = $("title", copy);
            if (title.length === 0) {
                title = $("<title />");
                copy.append(title);                
            }
            title.text(options.title);            
        }
        // Appedned content
        copy.append(getjQueryObject(options.append));
        // Prepended content
        copy.prepend(getjQueryObject(options.prepend));
        if (options.manuallyCopyFormValues) {
            // Manually copy form values into the HTML for printing user-modified input fields
            // http://stackoverflow.com/a/26707753
            copy.find("input")
                .each(function () {
                    var $field = $(this);
                    if ($field.is("[type='radio']") || $field.is("[type='checkbox']")) {
                        if ($field.prop("checked")) {
                            $field.attr("checked", "checked");
                        }
                    } else {
                        $field.attr("value", $field.val());
                    }
                });
            copy.find("select").each(function () {
                var $field = $(this);
                $field.find(":selected").attr("selected", "selected");
            });
            copy.find("textarea").each(function () {
                // Fix for https://github.com/DoersGuild/jQuery.print/issues/18#issuecomment-96451589
                var $field = $(this);
                $field.text($field.val());
            });
        }
        // Get the HTML markup string
        var content = copy.html();
        // Notify with generated markup & cloned elements - useful for logging, etc
        try {
            options.deferred.notify('generated_markup', content, copy);
        } catch (err) {
            console.warn('Error notifying deferred', err);
        }
        // Destroy the copy
        copy.remove();
        if (options.iframe) {
            // Use an iframe for printing
            try {
                printContentInIFrame(content, options);
            } catch (e) {
                // Use the pop-up method if iframe fails for some reason
                console.error("Failed to print from iframe", e.stack, e.message);
                printContentInNewWindow(content, options);
            }
        } else {
            // Use a new window for printing
            printContentInNewWindow(content, options);
        }
        return this;
    };
})(jQuery);

我将如何运行第一个，等待5秒钟左右，然后运行jquery打印？我很难过这一点。因此，id将首先运行，然后打印将在id =“ abc”之后运行。这是正在使用的代码的示例：

<div id="test">
<button id="abc" class="btn" onclick="jQuery.print(#test1)"></button>
</div>

Answer 1

如果我正确理解了您的问题，则您希望先运行jQuery click函数，使具有id="test1"的div可见，然后，一旦可见，就想运行{{1 }}调用onclick的代码。

我首先建议的是，您没有两个不同的地方来处理click实现，这会使您的代码难以理解。

我将用以下内容替换您的jQuery.print：

$('#abc').click

此函数在被调用时将在传递的选择器上调用function printDiv(selector) { $(selector).show(); window.setTimeout(function () { jQuery.print(selector); }, 1); } ，等待1毫秒，然后调用jQuery.show。如果您需要延长超时时间，只需将jQuery.print更改为所需的值即可。要使用该功能，请将示例1更新为以下内容：

html

单击按钮后，它将立即调用前面提到的函数，并将要打印的对象的ID传递给它。

就您的第二个功能而言，在注释<div id="test"> <button id="abc" class="btn" onclick="printDiv('#test1')"</button> </div> 处，您应该将其保留。它所做的只是利用打印功能扩展了**//run this second**对象。您需要它立即运行，并且目前需要。