试试这个:

<div
  class="modal fade"
  id="customer_bill_gen"
  data-keyboard="false"
  data-backdrop="static"
>

如果你想更改默认值:

对于引导3.x:

$.fn.modal.prototype.constructor.Constructor.DEFAULTS.backdrop = 'static';
$.fn.modal.prototype.constructor.Constructor.DEFAULTS.keyboard =  false;

对于bootstrap 4。X和5.x:

$.fn.modal.prototype.constructor.Constructor.Default.backdrop = 'static';
$.fn.modal.prototype.constructor.Constructor.Default.keyboard =  false;

试试这个:

<div
  class="modal fade"
  id="customer_bill_gen"
  data-keyboard="false"
  data-backdrop="static"
>

这个解决方案对我很有效:

$('#myModal').modal({backdrop: 'static', keyboard: false})  

与 data-backdrop =“静态”data-keyboard = " false "

在按钮启动模态

在Options一章中，在您链接的页面中，您可以看到背景选项。通过这个值为static的选项将阻止关闭模态。 正如@PedroVagner在评论中指出的那样，你也可以通过传递{keyboard: false}来防止按Esc关闭模态。

如果你用js打开模态，使用:

$('#myModal').modal({backdrop: 'static', keyboard: false})  

如果您正在使用数据属性，请使用:

 <button data-target="#myModal" data-toggle="modal" data-backdrop="static" data-keyboard="false">
    Launch demo modal
 </button>`

如果你不知道模式是否已经打开或者还没有打开，你需要配置模式选项，还有一个选项:

引导3.4

var $modal = $('#modal');
var keyboard = false; // Prevent to close by ESC
var backdrop = 'static'; // Prevent to close on click outside the modal

if(typeof $modal.data('bs.modal') === 'undefined') { // Modal did not open yet
    $modal.modal({
        keyboard: keyboard,
        backdrop: backdrop
    });
} else { // Modal has already been opened
    $modal.data('bs.modal').options.keyboard = keyboard;
    $modal.data('bs.modal').options.backdrop = backdrop;

    if(keyboard === false) { 
        $modal.off('keydown.dismiss.bs.modal'); // Disable ESC
    } else { // 
        $modal.data('bs.modal').escape(); // Resets ESC
    }
}

引导 4.3+

var $modal = $('#modal');
var keyboard = false; // Prevent to close by ESC
var backdrop = 'static'; // Prevent to close on click outside the modal

if(typeof $modal.data('bs.modal') === 'undefined') { // Modal did not open yet
    $modal.modal({
        keyboard: keyboard,
        backdrop: backdrop
    });
} else { // Modal has already been opened
    $modal.data('bs.modal')._config.keyboard = keyboard;
    $modal.data('bs.modal')._config.backdrop = backdrop;

    if(keyboard === false) { 
        $modal.off('keydown.dismiss.bs.modal'); // Disable ESC
    } else { // 
        $modal.data('bs.modal').escape(); // Resets ESC
    }
}

将选项更改为_config