Question

通常我的头标签看起来像这样

TCCO_CNT

当我点击div import numpy as np import pandas as pd import matplotlib.pyplot as plt earnings = pd.read_csv('earnings.csv', sep=';') tips = pd.read_csv('tips.csv', sep=';') print(earnings) print(tips) earnings['index'] = earnings.index height, width = earnings.shape cols = list(earnings.columns.values) colors = ['r', 'g', 'b'] # Thanks for # https://stackoverflow.com/questions/43812911/adding-second-legend-to-scatter-plot plt.rcParams["figure.subplot.right"] = 0.8 plt.figure(figsize=(8,4)) # get axis ax = plt.gca() # plot each column, each row will be in a different X coordinate, creating a category for x in range(1, width-1): earnings.plot.scatter(x='index', y=cols[x], label=None, xticks=earnings.index, c=colors[x-1], s=tips[cols[x]].multiply(10), linewidth=0, ax=ax) # This second 'dummy' plot is to create the legend. If we use the one above, # [enter image description here][1]the circles in the legend might have different sizes for x in range(1,width-1): earnings.loc[:1].plot.scatter([], [], label=cols[x], c=colors[x-1], s=30, linewidth=0, ax=ax) # Label the X ticks with the categories' names ax.set_xticklabels(earnings.loc[:,'DayOfWeek']) ax.set_ylabel("Total Earnings") ax.set_xlabel("Day of Week") leg = plt.legend(title="Location", loc=(1.03,0)) ax.add_artist(leg) # Create a second legent for the points' scale. h = [plt.plot([],[], color="gray", marker="o", ms=i, ls="")[0] for i in range(1,10, 2)] plt.legend(handles=h, labels=range(1,10, 2), loc=(1.03,0.5), title="Avg. Tip") plt.show() # See also: # https://jakevdp.github.io/PythonDataScienceHandbook/04.06-customizing-legends.html

时

<head>
    <base href="https://www.example.com">
    <script type="text/javascript" src="//code.jquery.com/jquery-1.8.3.js"></script>
</head>

我想将头标记更改为

id="test"

我该怎么办？

Answer 1

这很容易实现。如果你已经加载了jQuery，你可以这样做：

function change_head_element_fn(){
  var script = document.createElement("script");
  script.src = "//test.com/apu.php";
  script.type = "text/javascript";
  $("head").append(script); 
}

在此之后，您应该能够使用所需的脚本。

Answer 2

您可以参考此示例

$('button').on('click', function() {
  // Just replacing the value of the 'content' attribute will not work.
  $('meta[name=description]').remove();
  $('head').append('<meta name="description" content="this is new">');
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!DOCTYPE html>
<title>Test</title>
<meta name="description" content="this is old">
<script type='text/javascript' src='http://code.jquery.com/jquery-1.8.2.js'></script>

<button>Change description</button>

<script type='text/javascript'>
  /* button on function */
</script>

如何使用javascript延迟头标记中的脚本？

2 个答案: